Bluescreens only when on youtube, but never on anything else?

I just don't understand it. My computer can watch videos, play games, listen to music, and the list goes on. I've got Avira AntiVirus, with updated graphics/video card and antivirus definitions. I simply do not understand why it is youtube, of all things that is causing my computer to bluescreen. It has happened twice. All my files are intact and everything. It just doesn't like youtube for some reason. What could the problem be?