Yep, it seems I had an extension installed on opera 20 and I forgot about it, I removed it. Everything works fine on opera 20. On opera 12 the same thing happens, maybe because it's too old? Thank you for your help, I really appreciate it!

This is the first thing I did yesterday. I've installed it again, a few minutes ago, just to make sure and no luck. The problem is still there.

Hello, I currently have Opera 12 and Opera 20 installed on my PC. Until yesterday YouTube worked fine, on both but it started to act weird.

On Opera 12 whenever I open a new YouTube page, the browser goes in the "not responding" state for half a minute (less or more), then everything works fine. If I open a new YouTube page again, the same thing happens.

On Opera 20 when I open a new YouTube page, nothing is wrong, but then I click on a video, everything on the page disappears, except the video.

I even recorded and uploaded a video, take a look: https://www.youtube.com/watch?v=_AsFvQqzo5A

On Firefox, YouTube works just fine. What could the problem be?

Thanks for your time.