I have a lot of movies bought over the years on iTunes. While I know that Plex can’t play those, it would sure be awesome to have them in my library and watchlist. Especially on macOS and iOS-Devices, I could play them in the AppleTV-App once triggered by Plex…just as it does with AppleTV+ content.
Same goes for bought or rented content on Amazon, Google etc.
You can add them already to the Watchlist.
It’s just that Plex cannot know that you “bought” them on these services, because it just has no access to your user account on there. (And it’s not likely that Plex will gain access.)
There’s a suggestion which is trying to address this. The OP of that suggestion is asking for an option to add items from Plex’ Discover to a local library. That library entry is supposed to point to a specific/selected streaming provider.
So in your example…
you search for a movie in Discover
you check if it’s available on Apple/Google/Amazon using the Where to Watch hub
Some new option / context menu item on the streaming provider link to allow you adding the item to your library
Clicking the item inside the library should bring up the provider app / web page for that movie / show / …
Given the restriction posed by Apple this is a great solution! This way, I could at least see and easily open the movies I “own” on the different other services.
In that case I suggest you comment/vote in that thread in order to help us avoid distracting or cannibalizing votes because of duplicate suggestions. Unless there’s a unique aspect of your original suggestion I suggest we close this thread as a duplicate instead.