Try watching YouTube on Google Chrome, if you aren't already.It's pretty much made for watching YouTube.http://www.google.com/chrome
Looks like I have the browser problem, IE is able to load the video with regular http access.
What one were you using before?
So apparently what's happening is that Adobe Flash doesn't have a version for IE 9 yet. forget I'm an idiot.
http://www.youtube.com/html5Use the HTML5 player.