Content accessibility
YouTube offers users the ability to view its videos on web pages outside their website. Each YouTube video is accompanied by a piece of HTML that can be used to embed it on any page on the Web.[106] This functionality is often used to embed YouTube videos in social networking pages and blogs. Users wishing to post a video discussing, inspired by or related to another user's video are able to make a "video response". On August 27, 2013, YouTube announced that it would remove video responses for being an underused feature.[107] Embedding, rating, commenting and response posting can be disabled by the video owner.[108]
YouTube does not usually offer a download link for its videos, and intends for them to be viewed through its website interface.[109] A small number of videos, such as the weekly addresses by President Barack Obama, can be downloaded as MP4 files.[110] Numerous third-party web sites, applications and browser plug-ins allow users to download YouTube videos.[111] 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.[112] In June 2012, Google sent cease and desist letters threatening legal action against several websites offering online download and conversion of YouTube videos.[113] In response, Zamzar removed the ability to download YouTube videos from its site.[114] The default settings when uploading a video to YouTube will retain a copyright on the video for the uploader, but since July 2012, it has been possible to select a Creative Commons license as the default, allowing other users to reuse and remix the material if it is free of copyright.[115]
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