Love love love your supple lower back and hips at the canter. You are in perfect sync with your horse's back.
At the trot, your lower leg is counter-swinging with each post which indicates you are not quite balanced. It might just be your upper body being a tad too far back. A great way to find out is to stand straight up every few posts and see if you stay there, fall forward or fall back. Also try posting every 3rd beat so you are switching diagonals frequently, or try sitting a beat or two every few posts.
Your hand position is good, but it does look a bit forced or stiff. Try shrugging your shoulders every now and then to keep them loose which lets everything else stay supple.
Definitely lots of improvement.