Well ****, can someone tell me what this noise is ?
https://youtube.com/shorts/koGTOCFHpB4?feature=share

So I started it without a/c, the engine sounds good. The noise went away, my a/c blows ice cold but anyone have an idea what this can be ? I guess it only comes on when the a/c is on

Take off the AC belt, spin the pulleys, might have the idler tensioner about to kaboom.