Unfortunately in the United States making a bogus copyright claim is less than the penalty for parking 13" from the curb. You might want to consider contacting EFF. They might help you with a lawsuit if you're wronged.
It is illegal to make a false copyright claim. Just not very illegal. Youtube can do whatever it wants. It is the way they keep from getting sued into infinity.
http://www.wired.com/threatlevel/201...utube-appeals/