sharing video with iTunes help

I somehow shared a video I created through Final Cut Pro, shared it via iTunes and was able to load it on my iPods and iTouches....now it's not letting me do it. I've looked over and over in forums and I get the same thing....iMovie>share>iTunes...except when I do this I keep getting "file name" was not copied because it cannot be played on this iPod.......I'm using iMovie 10.0.3 and iTunes 11.2.2