I did a really quick search and a mechanical hard drive costs around 1$ for 50gb of storage while a blank Blu-ray was closer to 1$ for 25gb of storage. That would suggest a drive is more effective at storing data from a cost perspective, so there just needs to be a service that sells movies in a digital format.
"Best we can do is an overpackaged, encrypted, read-only microSD for $49.99. It requires a dedicated proprietary media player and if you're lucky, it won't fail in a year."
No it didn't. I don't know if a single vendor aside from Bandcamp that will sell you the actual files, and let's be honest their catalogue is pathetic.