Fair enough i take your point on board.
Perhaps it wouldn't even be as much as what you think. I'd like to think that this may be a one off experience for someone.
Lets say for arguments sake i would like to watch Blade Runner in UHD. I post in the thread that i would like to watch and would someone care to borrow me it? With that you send me it and i send it back after viewing and no one else wants to see it.
Someone may post that they'd like to see Deepwater Horizon and someone else has it and are prepared to send it to that member and so on and so forth.
It's not fool proof, it's not without problems but may/could work as a community idea.....