Doesn't seem to work for me. At least until I got tired of refreshing.
A few times i did see a still from the video for a fraction of a second, but then it got overwritten by nothingness.
Well, I wasn't much of a fan of watching videos when the same info can be conveyed in writing in 1/20 of the time. Now I just have more incentive not to bother.
When blocking scripts. I get this issue when signed in, but a refresh fixes it. If I allow google.com, then it doesn't happen at all. When not signed in, I do often get issues or a captcha (that sometimes doesn't work), then I just switch to invidious usually.
I am signed in, because I use the google container extension so in theory only google sites know that I'm signed in.
Anyway, I won't investigate further. If there's a video i really really want/need to watch I can open it in Chrome, which sends all my data to Google anyway.
A few times i did see a still from the video for a fraction of a second, but then it got overwritten by nothingness.
Well, I wasn't much of a fan of watching videos when the same info can be conveyed in writing in 1/20 of the time. Now I just have more incentive not to bother.