You know, as far as UMD movies are concerned, I'm sure there is some guy out there that wants every UMD video ever released for the PSP. And if said guy Googles "UMD Movie PSP Collection" or something and comes here, all the better.
For what it's worth, I consider UMD movies (as much as I find them useless) to be part of the PSP's library. They aren't games, sure. But Sony did utilize it's proprietary UMD format to release another form of media for their handheld. Now, that doesn't mean we should list every DVD ever released because the PS2 and up can play them. But the PSP, CDi and a few select others would be an exemption.