The gaming industry and the RIAA are in an interesting situation regarding compound works. Some games license music for their soundtrack, and the games developers want to license streamers to broadcast their games. But the streamer is not covered by the terms of the music license, so their content gets DMCA'ed. But even if the terms of the music license were to be adapted to allow for live streaming of the game, how could one detect that a song is being played as part of a game stream with the right license?