That sound in the 159 2.4 youtube clip, is the sound of the alternator bearings that sit on the spindle/shaft.
That's what i'd go to repair if the car was mine.
They have two bearings that sit either end of the shaft, front & rear ( internally ). As i've mentioned before you can buy an alternator bearing kit & clutch pulley. But your best bet, is to take it off & google an alternator repairer near you.
They will have it done in a day or so, but you can do an exchange & cash their way for a recon alternator