This happened to me too, a year ago I think, but not due to a music rights issue, but due to SoccerShowdown! I received an e-mail where Youtube said that two of my vids had to be removed from Youtube.
Here's what they said:
"Dear Member:
This is to notify you that we have removed or disabled access to the following material as a result of a third-party notification by Soccer Showdown Bv claiming that this material is infringing:
Sven Freestyle Football 6:
[...]" (click on the video twice and look what youtube said)
I don't know why it was removed, because everything in the video was from me, exept from the songs, so I didn't know why Soccer Showdown claimed that the material was infringing, as they don't produce any song. I replied to Youtube and explained everything, but they did not do anything :dontknow: From that day on I hate SSD :cursing: