It's happened to a few of you! You're toolin' along and then you can't see YouTube videos. It's those darn gremlins I keep telling you about. Well, here's a way to fix it according to Chris Mitchell, our very, very, very, very, very busy campus tech:
Go to start > run
In the run box copy and paste this phrase without the quotes: “gpupdate /force /boot”
And hit enter. This will refresh policies on your computer and restart it. After you log back in youtube etc should be unblocked.
And it really works!!