As the battle between YouTube and publishers such as Warner Music Group heats up, increasing numbers of video content publishers are finding that their videos have been stripped of their background music--or they've been removed entirely from the site. According to The New York Times, Warner Music is searching YouTube for songs it holds the copyright on and is requiring that those videos be taken down. YouTube, which is owned by Google, has licensing agreements with other major music companies; only those copyrighted by Warner are affected.

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