The image uploaded is selfexplanatory. The youtube bar is reversed and no volume buttom is displayed. I have made no changes in the browser that might explain this behaviour. The youtube bar is normal in other browsers in the same pc.
Cheers.
PS1.: I choosed a black screen video, but the reproduction if ok. The problem is only in the bar.
PS2: Versión 1.25.73 Chromium: 91.0.4472.106 (Build oficial) (64 bits)