YouTube officially launched the "polymer" redesign of its user interfaces based on Material Design language as its default, as well as a redesigned logo that is built around the service's play button emblem in August 2017. The lawsuit was filed due to alleged copyright infringement of Viacom's material by YouTube. 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 October 2010. That year, the company simplified its interface to increase the time users would spend on the site. On October 9, 2006, Google announced that they had acquired YouTube for $1.65 billion in Google stock. The choice of the name youtube.com led to problems for a similarly named website, utube.com.

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On July 30, 2025, amid the implementation of the Online Safety Act 2023 in the United Kingdom, Google announced that it would begin to enforce "age assurance" policies for selected users in the United States as a trial. Around the same time, YouTube started using server-side ad injection, which allows the platform to inject the ads directly into the video, instead of having the ad as a separate file which can be blocked. In April 2024, YouTube announced it would be "strengthening our enforcement on third-party apps that violate YouTube's Terms of Service, specifically ad-blocking apps". Users of ad blockers may be given a pop-up warning saying "Video player will be blocked after 3 videos". In October, YouTube announced that they would be rolling out customizable user handles in addition to channel names, which would also become channel URLs. In 2020, Roku removed the YouTube TV app from its streaming store after the two companies were unable to reach an agreement.

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• Should the uploader want to monetize the video again, they may remove the disputed audio in the «Video Manager».
• On August 5, 2015, YouTube patched the formerly notorious behavior which caused a video’s view count to freeze at «301» (later «301+») until the actual count was verified to prevent view count fraud.
• As of 2018update, public access to YouTube is blocked in many countries, including China, North Korea, Iran, Turkmenistan, Uzbekistan, Tajikistan, Eritrea, Sudan and South Sudan.
• In June 2022, the War Gonzo channel run by Russian military blogger and journalist Semyon Pegov was deleted.
• YouTube has enabled people to more directly engage with government, such as in the CNN/YouTube presidential debates (2007) in which ordinary people submitted questions to U.S. presidential candidates via YouTube video, with a techPresident co-founder saying that Internet video was changing the political landscape.
• In early 2018, Cohen began hinting at the possible launch of YouTube’s new subscription music streaming service, a platform that would compete with other services such as Spotify and Apple Music.

The developer has not yet indicated which accessibility features this app supports. In the United States as of November 2020, and June 2021 worldwide, YouTube reserves the right to monetize any video on the platform, even if their uploader is not a member of the YouTube Partner Program. In September 2016, after introducing an enhanced notification system to inform users of these violations, YouTube's policies were criticized by prominent users, including Philip DeFranco and Vlogbrothers. YouTube Play Buttons, a part of the YouTube Creator Rewards, are a recognition by YouTube of its most popular channels. In April 2017, YouTube set an eligibility requirement of 10,000 lifetime views for a paid subscription.

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• In December 2024, YouTube introduced new guidelines prohibiting videos with clickbait titles to enhance content quality and combat misinformation.
• The platform was first tested in India and later expanded to other countries, including the United States in March 2021, with videos now able to be up to 1 minute long.
• In October 2024, a Russian court fined Google 2 undecillion rubles (equivalent to US$20 decillion) for restricting Russian state media channels on YouTube.
• According to TubeMogul, in 2013 a pre-roll advertisement on YouTube (one that is shown before the video starts) cost advertisers on average $7.60 per 1000 views.
• It also offers YouTube Premium, a paid subscription option for watching content without ads.
• Video categories on YouTube include music videos, video clips, news, short and feature films, songs, documentaries, movie trailers, teasers, TV spots, live streams, vlogs, and more.

Despite its growth and success, the platform has been criticized for its facilitation of the spread of misinformation and copyrighted content, routinely violating its users' privacy, excessive censorship, endangering the safety of children and their well-being, and for its inconsistent implementation of platform guidelines. YouTube incorporated the Google AdSense program, generating more revenue for both YouTube and approved content creators. See what the world is watching — from the hottest music videos to what’s popular in gaming, fashion, beauty, news, learning and more. In February 2015, Nintendo agreed to share the revenue with the video creators through the Nintendo Creators Program. In 2010, it was reported that nearly a third of the videos with advertisements were uploaded without permission of the copyright holders. A YouTube spokesperson stated that while the policy itself was not new, the service had "improved the notification and appeal process to ensure better communication to our creators".

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At the time of uploading a video, YouTube users are shown a message asking them not to violate copyright laws. YouTube has faced numerous challenges and criticisms in its attempts to deal with copyright, including the site's first viral video, Lazy Sunday, which had to be taken down, due to copyright concerns. On November 11, 2021, after testing out this change in March of the same year, YouTube announced it would start hiding dislike counts on videos, making them invisible to viewers. That was disputed by Billboard, which said that the two billion views had been moved to Vevo, since the videos were no longer active on YouTube.

In January 2010, YouTube introduced a film rentals service, available in many countries, and TV shows can be bought in several countries. YouTube had $29.2 billion ads revenue in 2022, up by $398 million from the prior year. According to Google, YouTube had made US$15.1 billion in ad revenue in 2019, in contrast to US$8.1 billion in 2017 and US$11.1 billion in 2018. Google first published exact revenue numbers for YouTube in February 2020 as part of Alphabet's 2019 financial report. Prior to 2020, Google did not provide detailed figures for YouTube's running costs, and YouTube's revenues in 2007 were noted as "not material" in a regulatory filing. The Legion of Extraordinary Dancers and the YouTube Symphony Orchestra selected their membership based on individual video performances.
In April 2013, it was reported that Universal Music Group and YouTube have a contractual agreement that prevents content blocked on YouTube by a request from UMG from being restored, even if the uploader of the video files a DMCA counter-notice. In April 2012, a court in Hamburg ruled that YouTube could be held responsible for copyrighted material posted by its users. YouTube's owner Google announced in November 2015 that they would help cover the legal cost in select cases where they believe fair use defenses apply. From 2007 to 2009 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.
In early April 2017, the YouTube channel h3h3Productions presented evidence claiming that a Wall Street Journal article had fabricated screenshots showing major brand advertising on an offensive video containing Johnny Rebel music overlaid on a Chief Keef music video, citing that the video itself had not earned any ad revenue for the uploader. In March 2017, the government of the United Kingdom pulled its advertising campaigns from YouTube, after reports that its ads had appeared on videos containing extremist content. Access to specific videos is sometimes prevented due to copyright and intellectual property protection laws (e.g. in Germany), violations of hate speech, and preventing access to videos judged inappropriate for youth, which is also done by YouTube with the YouTube Kids app and with "restricted mode". On November 1, 2022, YouTube launched Primetime Channels, a channel store platform offering third-party subscription streaming add-ons sold a la carte through the YouTube website and app, competing with similar subscription add-on stores operated by Apple, Prime Video and Roku.

In July 2023, YouTube removed the channel of British journalist Graham Phillips, active in covering the war in Donbas from 2014. In June 2022, the War Gonzo channel run by Russian military blogger and journalist Semyon Pegov was deleted. In 2021, two accounts linked to RT DE, the German channel of the Russian state-owned RT network, were removed for breaching YouTube's policies relating to COVID-19.
Under YouTube's changes to its recommendation engine, the most-recommended channel evolved from conspiracy theorist Alex Jones (2016) to Fox News (2019). Senate introduced a resolution condemning Joseph Kony 16 days after the "Kony 2012" video was posted to YouTube, with resolution co-sponsor Senator Lindsey Graham remarking that the video "will do more to lead to (Kony's) demise than all other action combined." YouTube has enabled people to more directly engage with government, such as in the CNN/YouTube presidential debates (2007) in which ordinary people submitted questions to U.S. presidential candidates via YouTube video, with a techPresident co-founder saying that Internet video was changing lolospin casino review the political landscape.