lol... I just totally ruined this thread for myself to make that joke.
I'll edit it... later.
Seriously though I think it is an HTML5 thing.
Youtube switched to the HTML5 vid platform a while back IIRC but I think what's happening is some sites and/or browser/OS/etc settings are forcing (some of) our browsers/systems to load whatever flash version YT is currently serving up to us dinobots (so instead of the cake forum fetching the HTML5 embed in our browsers it's mucking about and fetching the old flash version which I'm sure google is trying to kneecap as best it can).
Anyhoo... that's just a guess and I'm likely blowing bubbles out my butt... however....
*bubble noises*