OK, WTHeck!

I just tried to post an embed from Youtube and the embed comes up as iframes
I've never seen this before on YT. Are they (GASP!) switching over?

The page is at:
http://www.youtube.com/watch?v=MREKsMPUdcg

The code comes up as:
<iframe title="YouTube video player" class="youtube-player" type="text/html" width="640" height="390" src="http://www.youtube.com/embed/MREKsMPUdcg" frameborder="0"></iframe>

Anyone have any ideas what is going on?