I watched the hearing, and he did act like that. Certainly not all the times, but there were scattered moments where I was trying to discern if he was having tics or mini-seizures. (I’m a nurse, so my mind goes that way.) Only afterward did I see these memes. They are slowed-down and looped, which certainly exaggerates the movements, but there were discernable oddities like this during the hearing.
Then I don’t think we watched the same hearing. I watched the entire thing and never saw anything peculiar about his behavior - other than his lies.. People sitting in one position hours at a time may shift position occasionally but he did not rock side to side.