I have UBlock installed on Firefox and what is pictured here is what has been happening for every video that I’m clicking on. Panning doesn’t make the video play either. I tried that. It’s not my internet connection since the videos and ads that you can’t even skip and pause when you tab out play just fine on Chrome. In the days before this happened I got several popups from YouTube saying that adblockers aren’t allowed after months of browsing YouTube ad-free without issue
No issues for me with Firefox and uBlock Origin. Do you have origin or just uBlock?
uBlock Origin. YouTube videos are playing without issue now!
Now that I think about it, if I leave a video tab open overnight it sometimes has to be refreshed to play the next day. That is the one thing that I have run into with youtube.