He may not able to post it "IF" its a private video clip just kidding.
Most video are encoded with their own codec, e.g. avi can be divx, dv codec or mjpeg.
Mpeg4 also come with many flavours, I means codec, Mobile phones use 3GP(codec), an
implementation of MPEG-4
Anyway, you can try use this Player to view your Nokia clips, hopefully its not totally damage: