can any of u tell me how this guy http://www.youtube.com/watch?v=S3bRPHPQsOs got clearance for the music in his video? hes just a newbie filmmaker and im pretty sure he doesnt have the resources to "buy" the rights to a kathy perry song like that. are there some loopholes ? i notice that youtube only removes audio from certain videos but then leaves others up why is that??