Seems to work well, but not perfectly, probably due to YT upping their strictness. So this is just to tell other people what to expect when using this add-on.

I whitelisted Youtube on my main adblocker (Adblocker Ultimate), and this add-on stopped any ads playing before the video, but a pop up did happen about 90 seconds in, stopping the video and asking how effective the ad that just played was (clicked least option and was able to continue with video). After that, about 6 minutes into the video, a brief 5 second ad played, breaking up the flow of the video (this was an interrupting ad, not an ad-read from the content creator). But this is a vast improvement to the recent crackdown on adblockers, which I need to have turned on because (a) my main laptop is older and by default more vulnerable and I want it to keep lasting and so have strict protections on it, and (b) because the volume and flow of all YT ad breaks triggers my neurodivergence, even when I know they are coming (especially the volume, and I have not had a YT ad that didn't do this).

Thank you, Raj, for this add-on!

Edit: the middle ad seems to be only with insanely popular channels and their videos, such as Doctor Mike or SciShow, and fadblock is now speeding those up too. After that first "how would you rate this ad" pop up, no more pop ups happened. So my previous experience might have been a one time thing as my browser was updating or whatever.

Again, this is a fantastic add-on, and thank you again for developing it, Raj!