It's not just me. Others are having the same problem according to a few of the boards I've checked.
That’s what I meant though. Sorry for the typo. It’s not you, it’s probably a lot of people suffering from the glitch. If you upload media and it gets store on specific serviers somewhere but address wrong, you pages wont display it. It just has to do with the layers of technology behind it all. Your youtube pages are being served from different hardware, and possibly completely different data centers, than the media servers. If there is a glitch in how the media is identified or indexed, then nothing will play when the page calls it. Just a theory.