Welcome to forum.
What part of indiana do you live?
I will be 30 min south of evansville next week.

That video is that of the noise with the belt on or off?

And you said the same noise happens if the belt is on and off correct?

Does motor appear like it is turning over as usual?

Is the noise like a starter that is spinning to easily?

If same noise happens with belt off, it would rule out pulleys, alternator and water pump.

So part of the belt shredded, not complete belt, the part of the belt toward front or toward engine?
Leave pieces of belt packed behind crank pulley?
But doesn't seem like the right noise.

Hard to tell from phone, sounds like mix between starter and valvetrain. Like timing chain, but that would be hard to believe on our engines, our setup should last along time.

Can you turn the motor over by hand