Update: The only conceivable way for this to work is to have users upload a video to a website you own, then have your app contact that website.
I am almost positive that this can't work, but I'd love to be wrong. I want to play a user's video loaded into iTunes from my (iPad) app.
It would also work to have the user load a video directly into the app from their computer (or any other source, really).
The only way I can see this working is downloading from a server I control, but user video would be loads better.
Is this at all possible? Is there a workaround to playing an arbitrary user's video that I'm not thinking of (iCloud, webPopop...)?