Add video to camera roll without using iPhoto? I have a bunch of video recorded and stored in Dropbox from another iOS device, I'd like to move this onto a new iOS device.

So far, the only way I can see of adding these videos to my Camera Roll is to put them into iPhoto on the Mac, add them to an album, then Sync that Album to the new device.

Any ideas?
The best solution I found in the end was to use iTunes, select Photo syncing then instead of using iPhoto, manually selecting a folder full of video. This had to be video that iOS could play natively, it didn't do any kind of conversion or compression.