For now I am not messing with my extensions to prevent the YT message. I found that the extension Kill Sticky, which eliminates all kinds of elements that cover content, blows away the popup. So, I just dismiss the message with one click when it comes up.
Eventually the adblocker situation will improve, I hope, but for now doing it this way is only a minor inconvenience.
Edit to add: Well I got the “countdown” popup, and you can certainly dodge it by blowing it away with a tool that deletes overlays… but the countdown continues and then it does block the content in a new way. Other people posted that accepting the ads once resets the countdown, this did not work for me. I ended up installing my own Invidious instance since I have a Linux box on my LAN but I look forward to better anti-anti-adblock extensions.