i dont know if itunes even plays movies. either way i dont use it. right click on it and press properties, it should say something under "Type of File". also try right click, open with, and then select like windows media player, something other than itunes that can play media.
Find out what file format it is, google "(whatever format it is in) to mpeg4 converter" Install the converter, and then convert the file. It will work in I tunes, and then you could burn the shit into a DVD.
Come black water keep on rolling, mississippi moon won't ya keep on shinin' on me