Nah the effect just comes from messing with the video speed. This is also what people do to make dancing videos with multiple dancers seem extraordinarily in sync with each other.
I watched this video half asleep pretty late at night and I thought it was AI-generated movement, but the guy got serious skills. I feel bad for posting this but my shame deserves to remain public.
The reason it looks so strange to your brain is because the video's speed has been messed with to emphasize the robotic effect. Someone else commented with a video of him doing this live on stage, and it just looks like anyone else who can do the robot well. Your brain is correct, the OP video is fake