How do I get a film or TV show from a DVD to an iPod Touch (or an iPad). I can digitize them using Handbrake, and I imagine the only way of watching them is in iTunes on the little device, but most files I have simply won't play in it, some even refuse to be imported. This goes for both .mov files and .mp4 files.
(Obviously, this ain't piracy, I already paid for the DVD and just want to watch it on the pod/pad, which won't play DVDs, without paying a second time through iTunes.)
Some of them work, but I can't figure out what's the deciding factor.