The truth is, anyone with a G73jh should really consider the vBIOS upgrade, as it allows one to use the latest ATI drivers, and the GPU runs much cooler, as well as throttling back when not needed. I upgraded to OD2 (the overdrive 2 vBIOS) and am glad I did. This upgrade will probably solve most if not all GSODs when gaming. However, having issues with you-tube videos is not something that should happen, even with the OEM vBIOS and driver. (I assume the OP is still using the Asus supplied video driver.)
Asus Maximus V Extreme BIOS 1903, see specs above avatar.
Asus G73 jh A1 laptop, BIOS 213, vBIOS OD2, 8 GB Ram, 240 GB Intel SSD, 180 GB Intel SSD. Win 7 Pro. Purchased new from PowerNotebooks.com in May 2010.
(both have 1920X1080 hd screens, mine above, hers below )
Asus G73 Sw XR1 laptop 8 GB Ram, 160 GB Intel SSD, 80 GB Intel SSD. Purchased used >Ebay 1/10/13, Did clean install of Windows 7