Thanks EQnoble for those two solutions.
However I performed both solutions, but still see the YouTube videos as white with noise when clicked the "play" icon.
I am going to have to play with this some more and see if it's a Windows setting, IE setting, ActiveX setting, or an Adobe Flash setting.
Okay, tried shutting down and waiting for 2 mins, then cold start. [No change]
Tried Disabling Hardware Acceleration [Did not work].
Tried proxy IP [Did not work]
Tried going through another server [Did not work]
I can see the xenForo embeded YouTube controls and can see the video full-screen.
But for some strange reason, just normal video it displays as pure white with sound.
Update: Even tried IE's compatibility functionality.