So out of no where yesterday... I drove my car and turned on the AC and it made this noise. And today I started my car on a cold engine and turned on the heater / defroster and it made this noise. Apparently after awhile of driving it goes away but comes back if the engine is cold. Anyone got any ideas or suggestions?

I don't know how to post video so I uploaded it here and provided a link.

http://tinypic.com/player.php?v=20kbyia&s=7

 

Need to replace your belts.