I am using Opera 43.0 on Windows 10. I cannot open YouTube videos most of the time. Sometimes they will play, but most of the time it'll be a black box with just audio. Flash is up-to-date. I tried using the HTML5 player, but the same result happened. Basically there is a black box with only audio. Both MSIE and Edge can play youtube fine. I ran a malwarebytes scan and nothing came up.
Thanks in advance.