Two ways to do so. I recommend using the first one as it will/should give you better quality.
Watch via WatchESPN.com
1) Go to WatchESPN.com
2) Click on Remote Access
3) It will ask you for your provider. Select Xfinity/Comcast
4) It should then take you to the Comcast login screen. Enter the following: Username: 2013VTFan Password: Hokies2013 (Or User: Football247365 PW: football2013 or User: VT2473652013 PW: football2013 or User: 2013VTHokies Password: FinalFour13)
5) Once you click ok/sign-in, you should be redirected back to the WatchESPN website where you should now have access to the game. All you need to do is find it and click on it. Enjoy!
Watch via stream
1) At 3:30pm, go to http://watchvt.blogspot.com. Password: VT2013.