I remember seeing a post actually talking about company brand extorsión lol, unfortunately you will never be able to get rid of all the videos, specially since passive critics are allowed in YouTube. You can just outrank their video keywords and tags... So your videos will always come up first...
Im not sure if myspace still the best way to get some audience since theres more social network
now like facebook if i were you i would just create a fanpage and put my music that i made there and
tell your friends to share it and like it.