Here's mine example: https://youtu.be/pFt6rRFSwJM

Hey, sorry for late response. I'm currently using Mac OS Sierra, but on the previous version was the same issue, so I don't think the problem is in the system version.

Hey, I really want to use this browser as my daily, but I just can't stand the issues with youtube players. Some videos play ok, but some doesn't, I was searching for solution to this problem, but I can't find. Can you please help me?