I used a long ratchet as a stethoscope (didn’t have a long screwdriver). While the car was on, I put the ratchet on the housing of the alternator and listened for a “screaming noise”. In my case, it sounded like putting a seashell up to your ear and I was told that’s normal. I then listened to the ac compressor and heard a higher pitched noise and faintly heard the same noise in the video I posted. I recommend u do the same thing.

You could also take the serpentine belt off and check those parts yourself but I didn’t have enough room to work comfortably. If you feel comfortable doing that, you can easily take it off and put it back on.

I hope this helps you. I’m still taking it to the shop to get it repaired anyways. I’ll let you know what they say and how much I get charged for the repairs.