Ive been making warcraft movies on my own for a couple of years now and heres a site I never miss when I want video game related music.
http://www.jamendo.com/en/artist/274...l-aeon-project .
Also check out the other projects - they range from soft melodies to rough beats + all the authors compositions are free to use for everyone.
If you can be more specific as to whats gonna be in the movie (pvp maybe?)
I can give you alot more suggestions.
Hope this helps a little. -Cheers *Sorry if my wording seems unclear. Im on my smartphone right now.