For some reason, when I play youtube videos I can't see anymore the bar at the bottom of the window with the controls to go fast forward, pause, cc or resolution. Instead there is a long black bar. Kind of anoying, if want to skip a boring part or go back to a scene. Only option is click in the midle of the window to stop and play.

Does someone knows what's going on ?

Funny think is when I click youtube videos inside a thread here, the videos have all controls available, so it only happens when I use the youtube site.

I know I'll get the right answer here, so thanks since now.

I cant help you but I have issues with sound on youtube. Sometimes I have to hit F5 to refresh the page and then its muted and I have to pull the volume up. This morning came a adobe update, maybe this will fix your issue too. I did not tried YT yet.