How to upgrade SD movie purchase to HD version on Apple TV?
I bought the SD version of a movie in 2009, and want to "upgrade" it to the HD version.
(The "iTunes Extras" which came with it are no longer available unless you have the HD version or above)
Apple TV says I own the movie and can play it, but I can't find any option to upgrade or buy the HD or 4K version.
Help!
[Re-Titled by Moderator]