fix alternator noise?

ok, this is not about my toyo truck, but yall been much help in the past, so maybe you can help with this toyota 2007 v6 2gr fe engine alternator issue.

Noise here: https://imgur.com/a/TE4NRZE
This site always sets speaker to off, so you need to click it on.

When I unplug the 3 wire alternator plug the noise stops. When i plug it back in, the noise starts immediately for 1/2 a second, then stops for 3 to 5 seconds before starting again.

once noise starts it does not stop.

The alternator usually starts making this noise after engine warms up for 10 to 15 minutes. Once in a while the noise starts 2 minutes after engine dead cold start. Last time I started it, it ran for 37 minutes with NO noise, then i shut her down for 2 minutes and restarted the engine, then after 45 seconds the noise started.

2 different screwdrivers touching front, mid section and rear of the alternator, with other end in my ear and I hear nothing. Same with short hose touching or just very near alt.

I cant reverse spin the Alt coupler pulley clutch\decoupler, as shown in this video. See https://youtu.be/1Duj1jh1rlA Mine behaved like his. If this is even a proper test for a toyota. My noise does sound like The Drake alt coupler pulley clutch\decoupler here: See https://au.toyotaownersclub.com/forums/topic/39853-issue-with-squeal-coming-from-engine-area/ Although mine also sounds like this alt rear bearing noise here: https://www.youtube.com/watch?v=dTNM5X7ufk4

So, is this actually the alternator making this noise?

Separate issue:

Turning accessory pulleys/tensioner/idlers by hand with belt off and hot engine I hear no noise, see no wobble and feel no oddities. Pulling/pushing them in and out, laterally back and forth(rocking), and laterally side to side I feel some play. Some more then others. pwr steer pump moves in and out a lot. tensioner same but less and also side to side. wtr pump moves in and out, but less so and rocks back and forth. AC comp moves in all 3 directions, but not by a lot. Upper idler rocks back and forth more so. Lower idler rocks back and forth just a little. I don't know how much is acceptable/normal or if I should be concerned about some of these. The Alternator I could feel no play.

toyota 2007 2gr fe engine (comes in many toyota models and lexus too)

 

If it is the original alternator, on a 2007, may be time for a new one, could be the bearings inside are worn.