Okay, so I think this is a problem with the fact that I installed Windows 8 recently, but I can't play youtube videos anymore.
I installed Adobe Flash Player, and then got a message that it was outdated, and I installed an update. Not sure if the update went through, but I think it did...
Checked on youtube, and couldn't see a link to download whatever you need to play videos on their site.
A link to a safe download would be perfect right about now. Thanks in advance!