I see this issue is old and still wasn't resolved
https://forums.opera.com/topic/38628/why-is-there-a-white-strip-at-the-top-of-youtube-video-in-full-screen/21

Hello,
Not sure if it's Linux specific but when I watch Youtube videos at full screen, there is a very narrow with line on the top of the video (above the video name, across the whole screen).

See example:
https://ibb.co/kq0RWq8

I tested in Chrome and Firefox, and had no such issue.

@leocg I read in this topic that the solutions stopped working.
so I didn't try it.

This video works fine for me,
However I did notice that Opera would not play some specific Youtube videos. not sure why.

Having the same issue...
No videos on Facebook, but Youtube works fine.
If Opera is now based on Google Chrome, why does it have new problems that Chrome doesn't have, and why the Devs ignore such major problems?

I see this issue is old and still wasn't resolved
https://forums.opera.com/topic/38628/why-is-there-a-white-strip-at-the-top-of-youtube-video-in-full-screen/21

Hello,
Not sure if it's Linux specific but when I watch Youtube videos at full screen, there is a very narrow with line on the top of the video (above the video name, across the whole screen).

See example:
https://ibb.co/kq0RWq8

I tested in Chrome and Firefox, and had no such issue.