Super tuning car runs good shooting for great

Not to argue but to me that does not sound like the pump slots.It seems to be taking a lot of rotation to initiate the rattle,way more than I have ever seen.Look how far he rotates it, like 2 inches! And the tone and timber is off for a pump, to my thinking.
I would pop that TC off there, inspect the slot wear.
Then I would check the stator and turbine splines.I can't see it being the turbine, nor the stator, but what else could it be? The sig says 727, so there's no loc-up clutch.
If it is the pump slots, how long can that go on before either the pump or the hub, shatters?
Maybe the stator clutch?
Or a failed hub. I think they are riveted in.