[Arnt]

Thanks, that's very useful.

I wonder whether that final exception is intended to cover the kind of end-to-end encryption Signal does, or rather the kind of end-to-end encryption the Netflix app does. Digital rights management. It's not clear to me that those can be separated — doesn't Jitsi use the same in-browser code as Vimeo? But it's also not clear to me what "not accessible to the user" means, exactly.

[BlueTemplar]

Yeah, as far as I understand, exactly this : for instance you can't use the DRM embedded in HDMI for your own purposes, you have to be a licensee and get access to the source code (and a way to modify the chips) for that.

Somewhat relevant :

HDMI Forum rejects AMD's HDMI 2.1 open-source driver :

https://news.ycombinator.com/item?id=41386667