YouTube explained

Company Name:YouTube, LLC
Caption:YouTube logo
Company Type:Subsidiary of Google, limited liability company
Founder:Steve Chen, Chad Hurley, Jawed Karim
Location City:901 Cherry Ave, San Bruno,
California
Location Country:United States
Area Served:Worldwide
Parent:Independent (2005–2006)
Google (2006–present)
Key People:Salar Kamangar (CEO)
Chad Hurley (Advisor)
Company Slogan:Broadcast Yourself
Industry:Internet
Url:
(see list of localized domain names)
Alexa: 3 [1]
Website Type:Video hosting service
Advertising:Google AdSense
Registration:Optional (Only required for certain tasks such as viewing flagged videos, viewing flagged comments and uploading videos)
Language:54 language versions available through user interface[2]
Current Status:Active

YouTube is a video-sharing website, created by three former PayPal employees in February 2005, on which users can upload, view and share videos. The company is based in San Bruno, California, and uses Adobe Flash Video and HTML5 technology to display a wide variety of user-generated video content, including movie clips, TV clips, and music videos, as well as amateur content such as video blogging and short original videos.

Most of the content on YouTube has been uploaded by individuals, although media corporations including CBS, the BBC, VEVO, Hulu, and other organizations offer some of their material via the site, as part of the YouTube partnership program. Unregistered users can watch videos, while registered users can upload an unlimited number of videos. Videos considered to contain offensive content are available only to registered users at least 18 years old. In November 2006, YouTube, LLC was bought by Google for US$1.65 billion, and now operates as a subsidiary of Google.

Company history

See main article: History of YouTube. YouTube was founded by Chad Hurley, Steve Chen, and Jawed Karim, who were all early employees of PayPal. Hurley had studied design at Indiana University of Pennsylvania, while Chen and Karim studied computer science together at the University of Illinois at Urbana-Champaign.[3]

According to a story that has often been repeated in the media, Hurley and Chen developed the idea for YouTube during the early months of 2005, after they had experienced difficulty sharing videos that had been shot at a dinner party at Chen's apartment in San Francisco. Karim did not attend the party and denied that it had occurred, while Chen commented that the idea that YouTube was founded after a dinner party "was probably very strengthened by marketing ideas around creating a story that was very digestible".

YouTube began as a venture-funded technology startup, primarily from a $11.5 million investment by Sequoia Capital between November 2005 and April 2006. YouTube's early headquarters were situated above a pizzeria and Japanese restaurant in San Mateo, California. The domain name www.youtube.com was activated on February 14, 2005, and the website was developed over the subsequent months.[4]

The first YouTube video was entitled Me at the zoo, and shows co-founder Jawed Karim at the San Diego Zoo. The video was uploaded on April 23, 2005, and can still be viewed on the site.[5]

YouTube offered the public a beta test of the site in May 2005, six months before the official launch in November 2005. The site grew rapidly, and in July 2006 the company announced that more than 65,000 new videos were being uploaded every day, and that the site was receiving 100 million video views per day. According to data published by market research company comScore, YouTube is the dominant provider of online video in the United States, with a market share of around 43 percent and more than 14 billion videos viewed in May 2010.[6] YouTube says that roughly 60 hours of new videos are uploaded to the site every minute, and that around three quarters of the material comes from outside the U.S.[7] [8] The site has eight hundred million unique users a month.[9] It is estimated that in 2007 YouTube consumed as much bandwidth as the entire Internet in 2000. Alexa ranks YouTube as the third most visited website on the Internet, behind Google and Facebook.[10]

The choice of the name www.youtube.com led to problems for a similarly named website, www.utube.com. The owner of the site, Universal Tube & Rollform Equipment, filed a lawsuit against YouTube in November 2006 after being overloaded on a regular basis by people looking for YouTube. Universal Tube has since changed the name of its website to www.utubeonline.com. In October 2006, Google Inc. announced that it had acquired YouTube for $1.65 billion in Google stock, and the deal was finalized on November 13, 2006. Google does not provide detailed figures for YouTube's running costs, and YouTube's revenues in 2007 were noted as "not material" in a regulatory filing. In June 2008, a Forbes magazine article projected the 2008 revenue at $200 million, noting progress in advertising sales. Visitors to YouTube spend an average of fifteen minutes a day on the site, in contrast to the four or five hours a day spent by a typical U.S. citizen watching television.[9]

In November 2008, YouTube reached an agreement with MGM, Lions Gate Entertainment, and CBS, allowing the companies to post full-length films and television episodes on the site, accompanied by advertisements in a section for US viewers called "Shows". The move was intended to create competition with websites such as Hulu, which features material from NBC, Fox, and Disney. In November 2009, YouTube launched a version of "Shows" available to UK viewers, offering around 4,000 full-length shows from more than 60 partners. In January 2010, YouTube introduced an online film rentals service, which is currently available only to users in the US, Canada and the UK.[11] The service offers over 6,000 films.

In March 2010, YouTube began free streaming of certain content, including 60 cricket matches of the Indian Premier League. According to YouTube, this was the first worldwide free online broadcast of a major sporting event.

On March 31, 2010, the YouTube website launched a new design, with the aim of simplifying the interface and increasing the time users spend on the site. Google product manager Shiva Rajaraman commented: "We really felt like we needed to step back and remove the clutter."[12] In May 2010, it was reported that YouTube was serving more than two billion videos a day, which it described as "nearly double the prime-time audience of all three major US television networks combined".[13] In May 2011, YouTube reported in its company blog that the site was receiving more than three billion views per day.[7] In January 2012, YouTube stated that the figure had increased to four billion videos streamed per day.

In October 2010, Hurley announced that he would be stepping down as chief executive officer of YouTube to take an advisory role, and that Salar Kamangar would take over as head of the company.

In April 2011, James Zern, a YouTube software engineer, revealed that 30 percent of videos accounted for 99 percent of views on the site.

In November 2011, the Google+ social networking site was integrated directly with YouTube and the Chrome web browser, allowing YouTube videos to be viewed from within the Google+ interface. In December 2011, YouTube launched a new version of the site interface, with the video channels displayed in a central column on the home page, similar to the news feeds of social networking sites. At the same time, a new version of the YouTube logo was introduced with a darker shade of red, the first change in design since October 2006.[14]

Features

Video technology

Playback

Viewing YouTube videos on a personal computer requires the Adobe Flash Player plug-in to be installed on the browser. The Adobe Flash Player plug-in is one of the most common pieces of software installed on personal computers and accounts for almost 75% of online video material.

In January 2010, YouTube launched an experimental version of the site that uses the built-in multimedia capabilities of web browsers supporting the HTML5 standard. This allows videos to be viewed without requiring Adobe Flash Player or any other plug-in to be installed.[15] [16] The YouTube site has a page that allows supported browsers to opt in to the HTML5 trial. Only browsers that support HTML5 Video using the H.264 or WebM formats can play the videos, and not all videos on the site are available.[17] [18]

Uploading

All YouTube users can upload videos up to 15 minutes in duration. Users who have a good track record of complying with the site's Community Guidelines may be offered the ability to upload videos of unlimited length, which requires verifying the account, normally through a mobile phone.[19] When YouTube was launched in 2005, it was possible to upload long videos, but a ten-minute limit was introduced in March 2006 after YouTube found that the majority of videos exceeding this length were unauthorized uploads of television shows and films.[20] [21] The 10-minute limit was increased to 15 minutes in July 2010. File size is limited to 2 GB for uploads from YouTube web page, and to 20 GB if up to date browser versions are used.[22]

YouTube accepts videos uploaded in most container formats, including .AVI, .MKV, .MOV, .MP4, DivX, .FLV, and .ogg and .ogv. These include video formats such as MPEG-4, MPEG, VOB, and .WMV. It also supports 3GP, allowing videos to be uploaded from mobile phones.[23] Videos with progressive scanning or interlaced scanning can be uploaded, but for the best video quality, YouTube prefers interlaced videos to be deinterlaced prior to uploading. All the video formats on YouTube use progressive scanning.[24]

Quality and codecs

YouTube originally offered videos at only one quality level, displayed at a resolution of 320x240 pixels using the Sorenson Spark codec (a variant of H.263),[25] [26] with mono MP3 audio.[27] In June 2007, YouTube added an option to watch videos in 3GP format on mobile phones.[28] In March 2008, a high quality mode was added, which increased the resolution to 480x360 pixels[29] In November 2008, 720p HD support was added. At the time of the 720p launch, the YouTube player was changed from a aspect ratio to a widescreen .[30] With this new feature, YouTube began a switchover to H.264/MPEG-4 AVC as its default video compression format. In November 2009, 1080p HD support was added. In July 2010, YouTube announced that it had launched a range of videos in 4K format, which allows a resolution of up to 4096x3072 pixels.

YouTube videos are available in a range of quality levels. The former names of standard quality (SQ), high quality (HQ) and high definition (HD) have been replaced by numerical values representing the vertical resolution of the video. The default video stream is encoded in H.264/MPEG-4 AVC format, with stereo AAC audio.[31]

Comparison of YouTube media encoding options
fmt value563435182237388382858443444546100101461021317
Default containerFLVMP4WebM[32] 3GP
VideoEncodingSorenson H.263MPEG-4 AVC (H.264)VP8MPEG-4 Visual
ProfileMainBaselineHigh3D3D
Resolution progressive224p270p360p480p360p720p1080p2304p240p360p520p720p360p480p720p1080p360p480p540p720p
Resolution VGAWQVGAHVGAnHDFWVGAnHDWXGAWUXGAHXGAnHDFWVGAWXGAWUXGA
Max width (pixels)400480640854640128019204096854640192012806408541280192064085419201280176
Max height (pixels)240270360480360720108030722403605207203604807201080360480540720144
Bitrate (Mbit/s)0.250.80.50.8–10.52–2.93–4.33.5–50.52-2.90.5120.52
AudioEncodingMP3AACVorbisAAC
Channels1–22 (stereo)1
Sampling rate (Hz)220504410022050
Bitrate (kbit/s)641289615296152128192128192

1 fmt was an undocumented URL parameter that allowed selecting YouTube quality mode without using player user interface. Since December 2010, this parameter is no longer supported.
2 Approximate values based on statistical data; actual bitrate can be higher or lower due to variable encoding rate.[33] [34] [35] [36]

3D videos

In a video posted on July 21, 2009,[37] YouTube software engineer Peter Bradshaw announced that YouTube users can now upload 3D videos. The videos can be viewed in several different ways, including the common anaglyph (cyan/red lens) method which utilizes glasses worn by the viewer to achieve the 3D effect. The YouTube Flash player can display stereoscopic content interleaved in rows, columns or a checkerboard pattern, side-by-side or anaglyph using a red/cyan, green/magenta or blue/yellow combination. In May 2011, an HTML5 version of the YouTube player began supporting side-by-side 3D footage that is compatible with Nvidia 3D Vision.[38]

Content accessibility

YouTube offers users the ability to view its videos on web pages outside the site. Each YouTube video is accompanied by a piece of HTML, which can be used to embed it on a page outside the YouTube website. This functionality is often used to embed YouTube videos in social networking pages and blogs.[39] Embedding, as well as ranking and commenting, can be disabled by the video owner.

YouTube does not usually offer a download link for its videos, and intends for them to be viewed through its website interface.[40] A small number of videos, such as the weekly addresses by President Barack Obama, can be downloaded as MP4 files. Numerous third-party web sites, applications and browser plug-ins allow users to download YouTube videos. In February 2009, YouTube announced a test service, allowing some partners to offer video downloads for free or for a fee paid through Google Checkout.

Platforms

Some smartphones are capable of accessing YouTube videos, dependent on the provider and the data plan. YouTube Mobile was launched in June 2007, using RTSP streaming for the video.[41] Not all of YouTube's videos are available on the mobile version of the site.[42]

Since June 2007, YouTube's videos have been available for viewing on a range of Apple products. This required YouTube's content to be transcoded into Apple's preferred video standard, H.264, a process that took several months. YouTube videos can be viewed on devices including Apple TV, iPod Touch and the iPhone.[43] In July 2010, the mobile version of the site was relaunched based on HTML5, avoiding the need to use Adobe Flash Player and optimized for use with touch screen controls.[44] The mobile version is also available as an app for the Android platform.[45] [46]

A TiVo service update in July 2008 allowed the system to search and play YouTube videos. In January 2009, YouTube launched "YouTube for TV", a version of the website tailored for set-top boxes and other TV-based media devices with web browsers, initially allowing its videos to be viewed on the PlayStation 3 and Wii video game consoles.[47] In June 2009, YouTube XL was introduced, which has a simplified interface designed for viewing on a standard television screen.[48] YouTube is also available for the Xbox Live.[49]

Localization

On June 19, 2007, Google CEO Eric Schmidt was in Paris to launch the new localization system. The interface of the website is available with localized versions in 42 countries, one territory (Hong Kong) and a worldwide version.[50] [51]

CountryLanguageLaunch date
(and worldwide launch)English (American)
Portuguese (Brazil)
French
English (Ireland)
Italian
Japanese
Dutch
Polish
Spanish and Catalan
English (United Kingdom)
Spanish (Mexico)[52]
English and Chinese (Traditional)
Chinese (Traditional)
English (Australia)
English (New Zealand)
English (Canada) and French (Canada)
German
Russian
Korea, SouthKorean
Hebrew
English (India) and Hindi
Czech
Swedish
English (South African)
Spanish (Argentina)
Arabic[53]
Arabic
Arabic
Arabic
Arabic
Arabic
Arabic
English (Kenya) and Swahili
English (official) and Filipino
English (Singapore)[54]
French (Belgian), and Dutch (Belgian)
Spanish (Colombia)[55]
English (Ugandan)[56]
English (Nigerian)[57]
Spanish (Chile)[58]
Hungarian[59]
English (Malaysian) and Malay[60]
Spanish (Peru)[61]
Arabic and English (UAE)

The YouTube interface suggests which local version should be chosen on the basis of the IP address of the user. In some cases, the message "This video is not available in your country" may appear because of copyright restrictions or inappropriate content.[62]

The interface of the YouTube website is available in 51 different language versions, including Catalan, Danish, Finnish, Greek, Hungarian, Norwegian and Slovene, which do not have local channel versions.[2]

Plans for YouTube to create a local version in Turkey have run into problems, since the Turkish authorities asked YouTube to set up an office in Turkey, which would be subject to Turkish law. YouTube says that it has no intention of doing this, and that its videos are not subject to Turkish law. Turkish authorities have expressed concerns that YouTube has been used to post videos insulting to Mustafa Kemal Atatürk and some material offensive to Muslims.

In March 2009, a dispute between YouTube and the British royalty collection agency PRS for Music led to premium music videos being blocked for YouTube users in the United Kingdom. The removal of videos posted by the major record companies occurred after failure to reach agreement on a licensing deal. The dispute was resolved in September 2009. In April 2009, a similar dispute led to the removal of premium music videos for users in Germany.

April Fools

YouTube has featured an April Fools prank on the site on April 1 of every year since 2008:

Censorship and filtering

See main article: Censorship of YouTube. Several countries have blocked access to YouTube, including:

Education authorities in some regions have blocked student access to YouTube, with some state education departments in Australia citing the inability to determine what sort of video material might be accessed.

YouTube was awarded a 2008 Peabody Award and cited for being "a 'Speakers' Corner' that both embodies and promotes democracy".[74]

Social impact

See main article: Social impact of YouTube. While other video hosting websites had been launched before YouTube in 2005 (including Metacafe in 2003 and Vimeo in 2004), YouTube was conceived to be, in the words of Jawed Karim, a video version of the rating site Hot or Not. Karim commented that Hot or Not was a site "where anyone could upload content that everyone else could view. That was a new concept because up until that point, it was always the people who owned the website who would provide the content." In December 2006, Time magazine wrote: "YouTube is to video browsing what a Wal-Mart Supercenter is to shopping: everything is there, and all you have to do is walk in the door."

An early example of the social impact of YouTube was the success of The Bus Uncle video in 2006. It shows a heated conversation between a youth and an older man on a bus in Hong Kong, and was discussed widely in the mainstream media. Another YouTube video to receive extensive coverage is guitar,[75] which features a performance of Pachelbel's Canon on an electric guitar. The name of the performer is not given in the video. After it received millions of views The New York Times revealed the identity of the guitarist as Lim Jeong-hyun, a 23-year-old from South Korea who had recorded the track in his bedroom. This video has since been removed from YouTube.[76]

Charlie Bit My Finger, which was uploaded on May 22, 2007, is a viral video that has received the most views of any user generated YouTube video, with over 300 million views.[77] [78] [79] The clip features two English brothers, with one-year-old Charlie biting the finger of his brother Harry, aged three.[80] In Time's list of YouTube's 50 greatest viral videos of all time, "Charlie Bit My Finger" was ranked at number one.[81]

Entertainment Weekly placed YouTube on its end-of-the-decade "best-of" list, describing it as: "Providing a safe home for piano-playing cats, celeb goof-ups, and overzealous lip-synchers since 2005."[82]

Community policy

YouTube has a set of community guidelines aimed to reduce abuse of the site's features. Generally prohibited material includes sexually explicit content, videos of animal abuse, shock videos, content uploaded without the copyright holder's consent, hate speech, spam, and predatory behaviour. Despite the guidelines, YouTube has faced criticism from news sources for content in violation of these guidelines.

Copyrighted material

At the time of uploading a video, YouTube users are shown a screen with the message "Do not upload any TV shows, music videos, music concerts or advertisements without permission, unless they consist entirely of content that you created yourself". Despite this advice, there are still many unauthorized clips of copyrighted material on YouTube. YouTube does not view videos before they are posted online, and it is left to copyright holders to issue a takedown notice pursuant to the terms of the Digital Millennium Copyright Act. Three successful complaints for copyright infringement against a user account will result in the account and all of its uploaded videos being deleted.[83]

Organizations including Viacom, Mediaset, and the English Premier League have filed lawsuits against YouTube, claiming that it has done too little to prevent the uploading of copyrighted material. Viacom, demanding $1 billion in damages, said that it had found more than 150,000 unauthorized clips of its material on YouTube that had been viewed "an astounding 1.5 billion times". YouTube responded by stating that it "goes far beyond its legal obligations in assisting content owners to protect their works". During the same court battle, Viacom won a court ruling requiring YouTube to hand over 12 terabytes of data detailing the viewing habits of every user who has watched videos on the site. The decision was criticized by the Electronic Frontier Foundation, which called the court ruling "a setback to privacy rights". In June 2010, Viacom's lawsuit against Google was rejected in a summary judgment, with U.S. federal Judge Louis L. Stanton stating that Google was protected by provisions of the Digital Millennium Copyright Act. Viacom announced its intention to appeal the ruling.

In August 2008, a US court ruled in Lenz v. Universal Music Corp. that copyright holders cannot order the removal of an online file without first determining whether the posting reflected fair use of the material. The case involved Stephanie Lenz from Gallitzin, Pennsylvania, who had made a home video of her 13-month-old son dancing to Prince's song "Let's Go Crazy", and posted the 29-second video on YouTube.

In the case of Smith v. Summit Entertainment LLC, Matt Smith sued Summit Entertainment for the wrongful use of copyright takedown notice on YouTube. He asserted seven causes of action, and four were ruled in Smith's favor.[84]

Content ID

In June 2007, YouTube began trials of a system for automatic detection of uploaded videos that infringe copyright. The system was regarded by Google CEO Eric Schmidt as necessary for resolving lawsuits such as the one from Viacom, which alleged that YouTube profited from pirated content. The system, which became known as Content ID, creates a ID File for copyrighted audio and video material, and stores it in a database. When a video is uploaded, it is checked against the database, and flags the video as a copyright violation if a match is found. When this occurs, the content owner has the choice of blocking the video to make it unviewable, tracking the viewing statistics of the video, or adding advertisements to the video. YouTube describes Content ID as "very accurate in finding uploads that look similar to reference files that are of sufficient length and quality to generate an effective ID File".[85] Content ID accounts for over a third of the monetized views on YouTube.[86]

An independent test in 2009 uploaded multiple versions of the same song to YouTube, and concluded that while the system was "surprisingly resilient" in finding copyright violations in the audio tracks of videos, it was not infallible.[87] The use of Content ID to remove material automatically has led to controversy in some cases, as the videos have not been checked by a human for fair use.[88] If a YouTube user disagrees with a decision by Content ID, it is possible to fill in a form disputing the decision.[89] YouTube has cited the effectiveness of Content ID as one of the reasons why the site's rules were modified in December 2010 to allow some users to upload videos of unlimited length.[90]

Controversial content

YouTube has also faced criticism over the offensive content in some of its videos. The uploading of videos containing defamation, pornography, and material encouraging criminal conduct is prohibited by YouTube's terms of service.[91] Controversial areas have included Holocaust denial and the Hillsborough disaster, in which 96 football fans from Liverpool were crushed to death in 1989.[92] [93]

YouTube relies on its users to flag the content of videos as inappropriate, and a YouTube employee will view a flagged video to determine whether it violates the site's terms of service.[91] In July 2008, the Culture and Media Committee of the House of Commons of the United Kingdom stated that it was "unimpressed" with YouTube's system for policing its videos, and argued that "proactive review of content should be standard practice for sites hosting user-generated content". YouTube responded by stating:

We have strict rules on what's allowed, and a system that enables anyone who sees inappropriate content to report it to our 24/7 review team and have it dealt with promptly. We educate our community on the rules and include a direct link from every YouTube page to make this process as easy as possible for our users. Given the volume of content uploaded on our site, we think this is by far the most effective way to make sure that the tiny minority of videos that break the rules come down quickly.

In October 2010, U.S. Congressman Anthony Weiner urged YouTube to take down from its website videos of imam Anwar al-Awlaki, saying that by hosting al-Awlaki's messages, "We are facilitating the recruitment of homegrown terror".[94] British security minister Pauline Neville-Jones commented: "These Web sites would categorically not be allowed in the U.K. They incite cold-blooded murder, and as such are surely contrary to the public good." In November 2010, YouTube removed from its site some of the hundreds of videos featuring al-Awlaki's calls to jihad. It stated that it had removed videos that violated the site's guidelines prohibiting "dangerous or illegal activities such as bomb-making, hate speech and incitement to commit violent acts", or came from accounts "registered by a member of a designated foreign terrorist organization".[95] In December 2010, YouTube added "promotes terrorism" to the list of reasons that users can give when flagging a video as inappropriate.

User comments

Most videos enable users to leave comments, and these have attracted attention for the negative aspects of both their form and content. When Time in 2006 praised Web 2.0 for enabling "community and collaboration on a scale never seen before", it added that YouTube "harnesses the stupidity of crowds as well as its wisdom. Some of the comments on YouTube make you weep for the future of humanity just for the spelling alone, never mind the obscenity and the naked hatred".[96] The Guardian in 2009 described users' comments on YouTube as follows:

Juvenile, aggressive, misspelled, sexist, homophobic, swinging from raging at the contents of a video to providing a pointlessly detailed description followed by a LOL, YouTube comments are a hotbed of infantile debate and unashamed ignorance – with the occasional burst of wit shining through.[97]
In September 2008, The Daily Telegraph commented that YouTube was "notorious" for "some of the most confrontational and ill-formed comment exchanges on the internet", and reported on YouTube Comment Snob, "a new piece of software that blocks rude and illiterate posts".[98]

See also

External links

Notes and References

  1. Web site: Youtube.com Site Info. Alexa Internet. 2012-04-02.
  2. Web site: YouTube language versions. January 15, 2012.
  3. Web site: YouTube: Sharing Digital Camera Videos. University of Illinois at Urbana-Champaign. November 29, 2008.
  4. Web site: Whois Record for www.youtube.com. April 1, 2009. DomainTools.
  5. Web site: Me at the zoo. YouTube. April 23, 2005. August 3, 2009.
  6. Web site: comScore Releases May 2010 U.S. Online Video Rankings. comScore. June 27, 2010.
  7. News: YouTube users uploading two days of video every minute. Shane Richmond. The Daily Telegraph. London. May 26, 2011. May 26, 2011.
  8. Web site: Eric Schmidt, Princeton Colloquium on Public & Int'l Affairs. YouTube. June 1, 2009.
  9. News: Streaming Dreams. The New Yorker. January 16, 2012. January 6, 2012. Seabrook, John.
  10. Web site: Alexa Traffic Rank for YouTube (three month average). Alexa Internet. March 30, 2010.
  11. News: YouTube to offer film rentals in the UK. BBC News. October 7, 2011. October 7, 2011.
  12. Web site: YouTube redesigns website to keep viewers captivated. AFP. April 1, 2010.
  13. Web site: YouTube serving up two billion videos daily. Chapman, Glenn. AFP. May 17, 2010.
  14. Web site: YouTube Gets New Logo, Facelift and Trackbacks – Growing Fast!. Cashmore, Pete. October 26, 2006. December 2, 2011..
  15. Web site: Watch this YouTube Video without the Flash Player. November 30, 2009.
  16. Web site: HTML5 YouTube viewer: close, but not quite there. November 30, 2009.
  17. Web site: YouTube HTML5 Video Player. January 21, 2010.
  18. Web site: Google tries freeing Web video with WebM. Shankland, Stephen. CNET.com. May 19, 2010. June 30, 2010.
  19. http://www.google.com/support/youtube/bin/answer.py?answer=71673 Video length for uploading
  20. Web site: YouTube caps video lengths to reduce infringement. Fisher, Ken. Ars Technica. December 4, 2008.
  21. Web site: Account Types: Longer videos. YouTube. December 4, 2008.
  22. Web site: Uploading large files and resumable uploading. YouTube. January 8, 2012.
  23. Web site: Video Formats: File formats. YouTube. December 4, 2008.
  24. Web site: Getting Started: File formats. YouTube. August 14, 2010.
  25. Web site: The quest for a new video codec in Flash 8. Tinic Uro. We went this route before with Sorenson Spark which is an incomplete implementation of H.263 and it bit us badly when trying to implement certain solutions.. August 13, 2005. January 27, 2011.
  26. Web site: Adobe Flash Video File Format Specification Version 10.1. Adobe Systems Incorporated. PDF. 72. Sorenson H.263. 2010. January 27, 2011.
  27. Web site: Market Demand for Sorenson Media's Sorenson Spark Video Decoder Expands Sharply. Sorenson Media. June 2, 2009. July 31, 2009.
  28. Web site: YouTube Mobile goes live. June 17, 2007. August 11, 2010.
  29. Web site: YouTube Blog – YouTube Videos in High Quality. March 24, 2008. YouTube. April 4, 2009.
  30. Web site: YouTube videos go HD with a simple hack. CNET. November 20, 2008. August 14, 2010.
  31. Web site: YouTube to get high-def 1080p player. November 29, 2009. CNET. December 2, 2009.
  32. Web site: This format is part of the HTML5 trial. Youtube. August 8, 2010.
  33. Web site: Approximate Youtube Bitrates. Patrick. McFarland. May 24, 2010. August 12, 2010.
  34. Web site: Bigger and Better: Encoding for YouTube 720p HD. December 2008. August 12, 2010.
  35. Web site: Youtube's 1080p – Failure Depends on How You Look At It. November 22, 2009. August 12, 2010. Greenfield. Trevor.
  36. Web site: 1080p HD Is Coming to YouTube. November 12, 2009. August 12, 2010. Biggs. Billy.
  37. Web site: YouTube in 3D. YouTube. July 21, 2009. August 3, 2009.
  38. Web site: YouTube Adds Stereoscopic 3D Video Support (And 3D Vision Support, Too). Ryan Smith. AnandTech. May 26, 2011. May 26, 2011.
  39. Web site: Sharing YouTube Videos. YouTube. January 17, 2009.
  40. Web site: Terms of Use, 5.B. YouTube. August 25, 2010.
  41. Web site: YouTube Mobile.
  42. Web site: Mobile YouTube. Google Operating System. June 15, 2007. January 17, 2009.
  43. Web site: YouTube Live on Apple TV Today; Coming to iPhone on June 29. Apple. June 20, 2007. January 17, 2009.
  44. Web site: Goodbye Flash: YouTube mobile goes HTML5 on iPhone and Android. Zibreg, Christian. July 8, 2010. January 9, 2012.
  45. Web site: YouTube Mobile Goes HTML5, Video Quality Beats Native Apps Hands Down. Kincaid, Jason. July 7, 2010. January 9, 2012.
  46. Web site: YouTube 2.1 App Now Available on Android Market. Google Mobile Blog. December 8, 2010. January 9, 2012.
  47. Web site: Coming Up Next... YouTube on Your TV. http://www.webcitation.org/5leW9usjn. November 29, 2009. YouTube Blog. January 15, 2009. May 10, 2009.
  48. Web site: Experience YouTube XL on the Big Screen. YouTube Blog. YouTube. June 2, 2009. June 20, 2009.
  49. Web site: Xbox Live Getting Live TV, YouTube & Bing Voice Search. Mashable. June 6, 2011. December 22, 2011.
  50. Web site: YouTube launches in Argentina. September 9, 2010. September 9, 2010.
  51. Web site: YouTube content locations. September 10, 2010.
  52. Web site: Presentan hoy YouTube México. El Universal. October 11, 2007. September 9, 2010. Spanish. YouTube México launched today.
  53. Web site: YouTube Launches Local Version For Algeria, Egypt, Jordan, Morocco, Saudi Arabia, Tunisia and Yemen. ArabCrunch. March 13, 2011.
  54. News: YouTube launches Singapore site. October 20, 2011. TODAY. October 20, 2011.
  55. http://thenextweb.com/la/2011/12/01/youtube-launches-localized-website-for-columbia/ YouTube launches localized website for Colombia
  56. http://pctechmagazine.com/index.php?option=com_content&view=article&id=1069:google-launches-youtube-uganda&catid=1:latest-news&Itemid=162 Google Launches YouTube Uganda
  57. http://www.techmtaa.com/2011/12/07/google-to-launch-youtube-nigeria-today/ Google to Launch Youtube Nigeria Today
  58. http://nextvlatam.com/index.php/5-otts/google-launches-youtube-chile/ Google launches YouTube Chile
  59. http://kultura.hu/main.php?folderID=1094&articleID=323455&ctag=&iid=11 Google Launches Hungarian YouTube
  60. http://the.amanz.my/2012/03/youtube-launches-in-malaysia/ YouTube Launches In Malaysia
  61. http://www.webpronews.com/youtube-peru-launched-expansion-continues-2012-03 YouTube Peru Launched, Expansion continues
  62. Web site: Learn More: Video not available in my country. YouTube Help. August 4, 2009.
  63. Web site: YouTube RickRolls Users. TechCrunch.com. March 31, 2008. April 2, 2010.
  64. Web site: YouTube RickRolls April Fools In. RyanSpoon.com. March 31, 2008. April 2, 2010.
  65. Web site: April fools: YouTube turns the world up-side-down. searchcowboys.com. April 1, 2009. April 2, 2010.
  66. Web site: TEXTp saves YouTube bandwidth, money. YouTube. April 1, 2010. April 2, 2010.
  67. News: YouTube goes back to 1911 for April Fools' Day. The Daily Telegraph. London. April 1, 2011. April 1, 2011. Shane. Richmond.
  68. News: Simon Cowell's bromance, the self-driving Nascar and Hungry Hippos for iPad... the best April Fools' gags. The Daily Mail. London. April 1, 2012. April 2, 2012. Pamela. Owen. Meghan. Keneally.
  69. Web site: Youku Transcends YouTube as China Becomes Center of Internet. Lococo. Edmond. Lee. Mark. Bloomberg News. October 23, 2010. October 17, 2010.
  70. News: Turkey lifts two-year ban on YouTube. BBC News. October 30, 2010. October 31, 2010.
  71. News: Turkey Reinstates YouTube Ban. The Wall Street Journal. November 2, 2010. November 2, 2010. Marc. Champion.
  72. Web site: Mobile phones, Facebook, YouTube cut in Iran. American Free Press. Google. July 13, 2009. July 8, 2009.
  73. Web site: Pakistan web users get round YouTube ban. Silicon Republic. http://web.archive.org/web/20080629065235/http://www.siliconrepublic.com/news/news.nv?storyid=single10381. June 29, 2008. November 30, 2008.
  74. Web site: Complete List of 2008 Peabody Award Winners. April 1, 2009. Peabody Awards, University of Georgia. April 1, 2009.
  75. Web site: guitar. December 20, 2005. August 3, 2009. YouTube.
  76. Lim's version of Canon Rock now produces the message "This video has been removed as a violation of YouTube's policy against spam, scams and commercially deceptive content. Sorry about that."http://www.youtube.com/watch?v=QjA5faZF1A8 The video was uploaded by the user guitar90, who was not Lim and had found the video on www.mule.co.kr. The YouTube version received around 92 million views before being removed in mid-2011.http://www.youtube.com/user/guitar90/feed Other YouTube users have since mirrored Lim's video, also without permission.
  77. Web site: Charlie bit my finger – again !. YouTube. May 2, 2011.
  78. News: Harry and Charlie Davies-Carr: Web gets taste for biting baby. Chittenden. Maurice. November 1, 2009. The Times. London. November 20, 2009.
  79. News: Meet YouTube's 224 million girl, Natalie Tran. Stack. Brittany. March 21, 2010. ¨The Sunday Telegraph. March 21, 2010.
  80. News: Lowered Expectations: Web Redefines 'Quality'. Learmonth. Michael. February 22, 2010. Advertising Age. March 21, 2010.
  81. News: YouTube's 50 Greatest Viral Videos. March 29, 2010. Time. April 11, 2010.
  82. Geier, Thom; Jensen, Jeff; Jordan, Tina; Lyons, Margaret; Markovitz, Adam; Nashawaty, Chris; Pastorek, Whitney; Rice, Lynette; Rottenberg, Josh; Schwartz, Missy; Slezak, Michael; Snierson, Dan; Stack, Tim; Stroup, Kate; Tucker, Ken; Vary, Adam B.; Vozick-Levinson, Simon; Ward, Kate (December 11, 2009), "THE 100 Greatest MOVIES, TV SHOWS, ALBUMS, BOOKS, CHARACTERS, SCENES, EPISODES, SONGS, DRESSES, MUSIC VIDEOS, AND TRENDS THAT ENTERTAINED US OVER THE PAST 10 YEARS". Entertainment Weekly. (1079/1080):74-84
  83. http://www.youtube.com/t/copyright_strike Why do I have a sanction on my account?
  84. Web site: http://scholar.google.com/scholar_case?case=4653165041580834913#[1 Smith v. Summit Entertainment LLC]. November 7, 2011.
  85. http://www.youtube.com/t/contentid_more More about Content ID
  86. http://www.youtube.com/t/press_statistics Press Statistics
  87. Web site: [https://www.eff.org/deeplinks/2009/04/testing-youtubes-aud Testing YouTube's Audio Content ID System]. April 23, 2009. Von Lohmann, Fred. December 4, 2011.
  88. Web site: [https://www.eff.org/deeplinks/2009/01/youtubes-january-fair-use-massacre YouTube's January Fair Use Massacre]. February 3, 2009. Von Lohmann, Fred. December 4, 2011.
  89. http://www.youtube.com/t/contentid_dispute Content ID disputes
  90. http://youtube-global.blogspot.com/2010/12/up-up-and-away-long-videos-for-more.html Up, Up and Away – Long videos for more users
  91. Web site: YouTube Community Guidelines. YouTube. November 30, 2008.
  92. Web site: YouTube criticized in Germany over anti-Semitic Nazi videos. Reuters. May 28, 2008.
  93. Web site: Fury as YouTube carries sick Hillsboro video insult. icLiverpool. May 24, 2008.
  94. News: Al-Awlaki's YouTube Videos Targeted by Rep. Weiner. Fox News. October 25, 2010. November 13, 2010.
  95. News: YouTube Withdraws Cleric's Videos. The New York Times. November 4, 2010. November 13, 2010. John F.. Burns. Miguel. Helft.
  96. http://www.time.com/time/magazine/article/0,9171,1569514,00.html "Time's Person of the Year: You"
  97. http://www.guardian.co.uk/technology/blog/2009/nov/03/youtube-funniest-comments "Our top 10 funniest YouTube comments – what are yours?"
  98. http://www.telegraph.co.uk/news/newstopics/howaboutthat/2668997/YouTubes-worst-comments-blocked-by-filter.html "YouTube's worst comments blocked by filter"