you're new update is cool.
I've found a way to embed an YouTube Video in HD (or any specified resolution). Simply add ?vq=hd720 to your iframe-url (http://www.youtube.com/embed/_7_Um8XkHSA?vq=hd720) it will play in HD.
I've tested it in the iFrame Player, with Flash and HTML5, both has worked. My question is now: can you implent this in your plugin?
Here's proof: http://www.applewerbung.de/2013/01/iphone5_traum/
Greetings, Apple Werbung