I've had something taken off Youtube before because of the backing music I used. It was fine for a couple of weeks then I edited it and included the name of the song and artist in the "tag". Next thing you know my vid was removed because of copyright infringement. They must have some search program that constantly searches the tags. I tried to repost it with a different tag but it was still rejected. Youtube must have recognised the old vid as being previously banned. I re-edited the whole vid with just a couple of tiny changes, used the original music (but didn't mention it in the tag) and loaded it up to Youtube, been there 4 years now.
I got some popular music in this vid too, also been there 4 years
Hope this was some help.
Cheers