MikeAqua:
In the OP example a song was playing on a radio in the hardly audible background of a YouTube clip. Advertising was enabled. The clip was blocked by YouTube. If this was a large release commercial film then either they would licence the song or risk being sued on release. In the case of the YouTube poster it is not worth sueing so they just use dcma to remove it from the net. Is that overkill or totally justified in your opinion?