Movie not Syncing

So I just looked at my ipod and realized it hadn't synced the movie I last put on it. I went to iTunes and it said that it had synced. I reapplied it and nothing changed. I just have a couple other movies on there which were purchased on iTunes that work fine. This one is from somewhere else, but it plays in iTunes, is the same format as the other movies, and says that it is on the ipod but won't actually show up. Any ideas why this could be? Thanks.

Any ideas? Everything is up to date.

If the movie is in you iTunes library on your computer and not syncing to your iPod, go into the Movies tab of your iPod in iTunes on you computer and make sure it has a check mark next to it so it will be included the next time you sync.

Yeah it's checked so it should be there, but just not showing up.