Good Footage John.
Agree with what you say on there.
Left foot is out, and not as high knee action as the right, but Miles better than what footage we have seen before. Again, look to the hip flexor and possibly opposite Groin.
Arm action, on top of what CF said about practicing it infront of a mirror, try also doing it whilst on a miniTramp - it may help. Not for Instability, but for feeling your arms working harder.
Did you also notice your Hip height? It’s there = awesome 