As some additional information, that is marginally germane, YouTube has recently begun to mute uploaded videos with readily identifiable music. Some acquaintances have had this affect them, and have tried to get clarification, but with no response as yet. The question was whether they had done this because of complaints, or of their own volition. ???

I find it interesting that many videos feature TV and movie clips that would obviously be subject to infringement charges, buy YouTube seems to feel that their disclaimer protects them. Yet they are muting/removing musical scores. What's up with that?