@simarino54 , I know I'm kind of late to the game here. I had the same problem and it was very frustrating, because I like the Opera browser and almost thought I had to stop using it. It is weird how the developers, or writers of the software don't address the issue.

Here's what works or should work:
In the browser settings,
--Turn off hardware acceleration
--Turn off Lucid Mode. (sharpen videos)
--Turn off Ad blockers and Cookie Blockers
--Refresh browser