Put that motor on a different ESC and test it again. If the problem remains, its the motor. If the problem goes away its the ESC…
From the sounds the motor is making, I’d say either the bearings are shot, or there is come “crap” stuck between the magnets and the stator pole pieces…
Just don’t put too long screws in when mounting.The bearings are tiny in these motors.I’ve changed a lot of bearings,mostly in my smaller motors.
All motors can fail straight out of the factory,especially the bearings.But magnets can come off and detritus can get in.I like to check mine when I buy them.I feel and listen for rough bearings constantly…