Soooo, interesting problem that just popped up a couple days ago.
Sometimes, when I try to watch a Youtube video (and just now, a video on an unrelated site), the first second or two will buffer and start playing, and then my screen goes black. Everything locks up, and a few seconds after that the computer clock on my laptop's secondary LCD stops running. I have to do a hard reset to fix it.
Using Chrome and Win7.
Most recent video that caused it is
http://achievementhunter.com/archive/episode.php?id=1932. I've tried to watch it twice now, with the same result. The advertisement at the start will buffer and play, but there's only about half a second of audio from the actual episode before everything dies. I've already watched that video last weekend though, it's just in the past day or two that this started.
However, it will play just fine in Firefox.
I'm wondering if it's some video codec that could be causing this, or if I've picked up some kind of virus. I'm running a full system scan at the moment, usually takes a couple hours.
EDIT: Well, Avast didn't find anything.