So your complaint is that they use the terms ‘buy’ but it’s basically the same as renting, right?

So presumably the problem here is that DRM in the video is causing it to behave like a subscription rather than a purchase?

It sounds to me like you still only rented it (but I’ve never used amazon video stuff - I did get a movie from apple/iTunes once and that was very clear on the time -based limitations).

I searched amazon video and its quite clearly pitching itself as another shitty subscription service.

I think once again this comes down to false expectations (and possibly shitty marketing?)

That’s just it with most of these services - you never bought 'em. You pay a subscription fee each month to use their service.

That is not buying, nor is it ownership.