Trying to indentify belt noise (video included)

Please play this video and listen to the noise my truck makes and help me identify it. It just started recently. It sounds like some sort of belt noise and happens when I start the truck up but goes away after a few seconds.

Does anyone know whats wrong with my truck and how to fix it? Thanks

 

Sounds like a loose or worn fan belt. There's 3 of them, if it's been awhile since they were changed, I'd replace them all. If they're fairly new, maybe one just needs tightened.

 

agreed, belts can look fine but the ridges wear out and slip on the pulley so a belt that's tight and looks ok can slip and squeak like that.

its definitely a belt slipping