PSP help!

i just downloaded a movie on my psp and it has two files the mp4 and a thm... but when i downloaded other movies and it does not have a thm file why wouldn't it work on my psp??? how can make it work??

thm is pretty much a photo icon for your film. you dont need it at all. novelty really. hope that helps.

thm is just a thumbnail file. PSP is very particular about movie format. Many movies in MP4 still wont play on PSP.

MP4 is an umbrella format that can use a number of different codecs. PSP will only be able to play certain codecs.