I wonder whether youtube-dl (which is what mpv uses to get audio/video over the web, I think) is going to get completely neutered by EME. Your setup is similar to how I use Youtube lately, and the recent progression of EME has got me worried that the setup won't be working for too much longer.
Re:Firefox Roadmap for Flash End-Of-Life
by nitrogen on Wednesday July 26, 2017 @06:35PM
(#14861015)
Is there any reason mpv couldn't stream encrypted video to the GPU? Or implement its own EME wrapper and use the same blob the browser uses?
Could you point to such an extension?
It's such a small change, but has a very large impact on the quality of my video-watching experience, I couldn't believe it initially.