I'll try here first before starting a new thread.
So, I have a problem with my PC and Youtube. Whenever I stary playing a Youtube vid in HD, my TV kind of acts as if I had changed channels. It goes dark for a second or two and then the image returns. The same happens some time after I have watched the Youtube vid and closed the Youtube tab with the video (not immediately). Apart from being a bit annoying, this wouldn't be a problem, except
1) I can't have two Youtube vids playing at the same time. If I do, my TV just goes black and nothing helps except the video ending or if I can somehow shut down the browser/tab where the video is playing (this is, of course, kinda hard when I can't see anything). This is not a particularly huge problem since of course you rarely have two youtube vids playing at the same time, but sometimes I might have one vid playing and I open a second one and before I manage to pause it my screen goes black
2) sometimes the screen goes black and doesn't return when I put a single HD Youtube video to full screen mode. And this only happens with Youtube. Not any other HD-feeds
Any idea what could be causing this problem and is there a way to fix this? I have some kind of Sony Bravia TV, if that helps with solving this issue. And I think this only happens with Firefox. Just tested and yes, this doesn't happen on Chrome.