I perfectly understand the implicit meaning of "buying" and what I get is a non-transferable license to access the movie from my account.
The same problem exists with video-games. It is much closer to a rental than ownership.
I believe that all these licenses should become transferable instead of locked to a specific account. I could somewhat agree to paying a small fee to achieve this, even though I believe it should be free. The technology to achieve this also exist (blockchain), so the only thing stopping big-media from doing this is greed.