Your point on that video? That cargo plane was on take off, hence the extreme climb, then lost its engines, and could not continue its take off acceleration.
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That 747 was carrying cargo and had a cargo shift to the rear. It continued to fly afterward for a short time. That’s my point. You specifically said a plane can’t fly unbalanced at all regardless of momentum, and that’s false.
That’s my point.
How much cargo shifted? Did that fully functional and not-noseless 747 climb 3800 feet before stalling and falling out of the sky? No? Why not?
I don't think that what we saw in that VIDEO was a plane FLYING.