Video controls: Play/Pause | Mute | Stop Video
(During the current update, controls are broken. I'm really sorry, I wasn't expecting to have to do this on the fly.)

jQuery tubular

Tubular is a jQuery plugin that lets you set a YouTube video as your page background. Just attach it to your body tag, specify a YouTube video ID and tell it the ID of your content wrapper, and you're on your way.

$('body').tubular('_VKW_M_uVjw','wrapper');

Please let me know if you use this code. I want to see what other developers put together.