Amazon Prime, like many services, is a DRM hell. It won’t go to over 480p on Firefox on Linux at my end. However, instead of a rant, I am interested in why this is happening. Say, I rented the same film from YouTube Movies(Yes, such a service exists) and the quality can toggle all the upto 1080p but the same title on Prime Video is stuck at 480p. Is it because both services use two DIFFERENT kinds of DRM?
Huh. I rented couple of old films and they previewed at full HD. Upon purchasing, they were viewable at 1080p. I was at the worst possible combination from these companies point of view(Firefox on Linux). I could be wrong but is it possible that it has something to do with the company renting out the movies themselves? YouTube Movies just acts as an intermediary, I think, and the main company providing the source is listed in the description.