If there was a product that let me convey "Come back later" to a barging inquirer with a sharp and uncanny hand motion, I might consider paying $249 for it:
The cinematics in Descent 3 (1999) had some very similar motion issues, enough so that I remember them today. It comes from incorrect smoothing in the IK animation, doesn't have to be AI generated.
I dunno, I found those cinematics to be pretty endearing. Sure, they've aged like mud, but I enjoyed the back in the early 2000's :) They stayed well clear of the uncanny valley.
Right about here[1] the hand motions of both characters have the same misapplied smoothing. Ignore the clipping through the table, watch the character tap the side of his head, it's got the same weird slow-down before touching the temple. Same for most of the other motions, they don't accelerate correctly.
https://cdn.flipperzero.one/lekyb_desktop_004.mp4