I have an annoying problem on my youtube, sometimes after a video I'll get a black screen and the video wont load, sometimes it's solved by changing the video quality manually, other times only a youtube's restart will solve. Guess what? I found a final solution for this sh*t:

Just get SmarthYoutubeTV: https://github.com/yuliskov/SmartYouTubeTV/releases/

You can use the older design or the shitty new one. I think it's still a web-wrapper, but the blank screen is basically gone, also you can stream on 4k (don't know if you can in the original youtube, since I don't really care for 4k content).