hey bro you need to convert de movie so it can play on the phone.
I use a program call HANDBRAKE its free, you need to download handbrake and dvd 43.
then on handbrake use iphone setings. then mpg4. then 480x320 resolution.then save'it to a file, it will take from 30 min to 11/2 hr to finish then go to where you save the movie and copi to your device, and you are done it showld play on he phone now.