Do you have a manual? if so have you looked at it?
I just pulled up the manual of it... will report back shortly
K, im back..
Looking at the manual together with your video it would seem that your gearbox is making noise.
I'd take the basket/arm off and remove the motor via the brackets going in to the playfield and put the motor in to test with nothing attached to it.
If it makes noise still, you have a couple of choices...
A) Send to PBR for rebuilding
B) Buy new motor http://www.pbresource.com/motor.html#gtb , I dont show that Motor 31102 is available... although it may be mechanically similar to one of the other available motors.
C) Try to rebuild or lube it yourself...