At Netflix, there are, for example, FlixGrab to download movies, etc. As mp4 file. Is there also a possibility with Amazon Prime?
I do not think so
You can download movies via the app to look offline
Had the films but like mp4 file
You can download movies / series and watch them offline via the app.
Could theoretically capture the movie / series Aufm PC from the screen.
As can then format as synonymous mp4 / whatever set.
Otherwise, you could try to find out where the app saves the stuff on your device. But it can certainly be that it is a special file format with which only the app can do something to avoid abuse (upload to YT etc.).
Okay thanks.