Here are some of mine. Windows Vista Ultimate ^^.
First one just showing basic Vista stuff, normal background, etc.
What’s this? 
A movie as my background? YEP, and its playing too 
.
Y HALO THAR AERO, with movie background ;D.
I love Vista 
Wish I had more .mpg files, I could’ve picked a better movie as my background. And no, no sound with it playing as desktop.