Oh man. I've narrowed it down; the latest Drivers for my graphics card doesn't like Youtube. Because I just uninstalled it, and it worked fine, then when I reinstalled it, it crashed it again, And because with the ATI installation manager , it doesn't let you NOT install the Microsoft Visual C++ 08 Redist, I uninstalled the Driver again, to see if it was maybe the actually CC++ 08 Redist, turns out it wasn't.
So it's definitely the damned driver. =\
I'm going to try install the driver version before the latest and see if that screws it up.