I watched it 3 times and half of that movement by hand moves the pitman arm, When you did the 1/8" turn jiggling part the arm actually moved a tiny bit at the end of each jiggle. You eyes can only focus on one thing at a time but look closely at that 1/8" turn jiggling/arm moving part. I would get another set of eyes to see where the pitman arm and downstream is going.