uBlock has been working fine. If you get blocked from youtube, you can go to uBlock options, click purge all caches, then "Update Now." Do a full reload in youtube and you're good to go. Tactics are changing continually.
https://drhyperion451.github.io/does-uBO-bypass-yt/
(it just checks the YT anti-AB script ID against the UB anti-anti-AB script ID to see if it has been updated).
I don't get the popup, but the video is just black and the play button does nothing.
Sometimes ublock doesn't work for me. I just open the video in a temporary container it works without any issues.
Have you tried this approach?