So I made an awesome Steve/Tony fanvid and posted it to YouTube because that's the only video hosting site I'm familiar with. Immediately, YouTube blocked the video based on the copyright of the music used. I've submitted a dispute that the fanvid is fair use. Can anyone here tell me either a) if claiming fair use works, generally, or b) what other video hosting sites are a good alternatives?

Well, off to bed. Maybe it will be unblocked in the morning.