i wonder if u can normaly play .avi files?

if u can then u might need a codec, some file r compressed/decompressed (codec) with difrent sofware i.e Xvid or DivX etc if u see things like this in the file name then u need the right codec, try looking up codec on the net u can get them mostly all 4 free but beware of bundles of crap (spyware/addware etc).