I bought Heavy Metal (1981) a couple of months ago. Amazon has since removed it for rent or purchase due to contract issues. I still own and can play the movie.
It’ll depend on the contracts and what their current dispute is, but eventually you won’t be able to watch it if they don’t get settled. Guarantee it, video rental companies lost this argument in the 80s, Amazon lost this argument with the Kindle a few years ago, this article is about them losing it again earlier this week. In the end they don’t own the content, they only lease the right to distribute, and that can be lost.