Wrong call

The hub is likely your issue..the axle can be quite bent before you would notice it at all...as the control arms hold the spindle/hub still. The only thing that can wobble is the bearing in the hub

Do you have excessive play in the bearing??

2nd video is set on private

What fixed it?

Well fix the third video now too.

Even if it was the diff (which it isn't) with a pair of joints in the axle the axle itself would just orbit and not affect the hub end

It has to be on the wheel/hub end. Usually it is the wheel. Even if you changed wheels did you verify they are straight on a balancer machine and that they are mounting flat on the hub face (use plastigage like with checking engine bearing clearance)

If you changed the hub, hub axle stub, & bearing then it has to be the wheel