I'm tellin yah what. I don't see much to pick on here. All the elements of great skiing are there. Early progressive dynamic center of mass movement, great inside foot steering, proper progressive transfers of pressure, great balance on the outside ski, great stance, great edging and angulation for the size of turn and intensity of terrain. In short, well above the PSIA level III standard. These are examiner quality turns.
I can go to individual frames and pick out little things caused by upsets in balance or slightly late movement patterns but all of the essential elements are there in the video 99% of the time. This skier no doubt beats himself up because he feels all those little mistakes but they don't really mean a hill of beans because all the efficient elements are in his skiing.
Ahhh, we could pick on the poles, he drags them. I drag my poles the same way. Keeping your arms up and the poles up helps a bit in balance and stability but contributes nothing to staying in the front seat when we ski. Lets face it, when I am relaxed my arms drop naturally. Big deal, its easier.