When I see a youtube embed, the frame for which is blocked by default using umatrix, I right-click it and open it with mpv. With my configuration, mpv performs better at video playback than any browser, saving me battery life. It also lets me use keybindings I'm familiar with, easily screenshot the video with a single press of the s key, and make video clips of the video too. This also bypasses youtube's age gating, without requiring me to have an account.
The same works for vimeo, dailymotion, etc. Even if the video embed doesn't even get created in the first place because I didn't run that page's javascript (I only run javacript on a whitelist basis), I can usually watch a video that would have been embedded in it by simply directing mpv to the hosting page itself. This even works for most local news websites (which seem to be the trashiest sort of pages on the web.)