Your overall design of position is good, but what I really noticed in your opening circle is that your lower leg moves a little, and that you need to work on *softly* following the canter with your seat. It looks like you understand the motion and how to follow, but that you're a little too active, driving or pushing with your seat rather than just following. That may also contribute to the lower leg moving. I suspect if you figured out the softer seat, your leg would stay quiet. Your horse looks like he's probably bumpy/difficult to sit.
Your position in the air over the first fence looked quite good, couldn't tell about the second.
Cute horse, but he looks like he can get a little strong. Really resisted the aids at the halt at the end. I'm not a huge fan of Kimberwicke bits, but understand they're fairly common at QH shows. I'd rather see a pelham than a Kimberwicke, because at least then you have the discretion of how much curb to use.