I have a couple video sites I forgot I had and justrealized they are now PR0 via Google. However, do these break Adsense's policies? I think they are very targeted and nicely done. http://www.caribbeancruisevideos.com/index.php http://www.caribbeanvacationsvideos.com/index.php
My guess would be that those sites are okay. Google doesn't like video sites made up of things like television shows, movies, etc because they are under heat for copyright right now. The best way thing to do though is email them and ask.
Add something to the content. If your site is only YouTube videos with nothing more, your account is in trouble. If you really aren't making much from them, I would pull the plug on placing adsense in them.