Yes, I agree with all the others. I have also noticed that when you do the light seat, you tend to lean your hands on the horse's neck. I understand if you just do it in the beginning to balance, but in actual fact you must keep your hands off the horse's neck and shoulders.
I have also come to notice that your stirrups seem uneven. Try to get them as even as possible, or else it may affect your horse's balance.
Also try and keep your hands as still as you can when you rise to the trot, only allowing them to move WITH the horse's head, not with your body. Try holding onto a neckstrap while you practise keeping your hands still.
Otherwise you have a lovely posture, and you move well with the horse when he canters, which is good. Your back is nice and straight and your heels are down. Carry on practising, and you could go very far.
Well done. = )
*~ THE HORSE STOPPED WITH A JERK, AND THE JERK FELL OFF -- Jim Culleton ~*