Congrats on the show!
Small coment on the dressage.. your saddle looks a tad too far forward, slide it back a bit. Also, be careful not to let your horse drop BTV. Add more leg and get him to really track up.
Now for the jumping.
First, your horse.
I must say, he is a carefull jumper! Big verticals are quite the challange to jump cleanly. He is also a very flat jumper. Nice for an equitation course,as he won't jar you out of position, but he can stand to be more round. Teach him to use his head and neck over the fence by getting him deep to his fences. Right now, he's taking off very far form the fence, as I think this spot makes it easier for him to clear the fence with the flat form he has now. Teach him that it is actually easier for him to get closer to the base and round over the jump instead of blasting straight above it. Not only is this a prettier jump, it is also more practical as the horse uses all the power in his more muscular back end. Lots of grids and bounces will get him cracking his back and really sitting back on his hocks. Ride him collected to each fence.
Now for the rider.
You are a strong rider, but could use just a few touch ups. Position your stirrup so that it is angles scross the ball of oyur foot with the outside brach leading the inside. This will allow your aknkle to be more flexible and sink that heel deeper. A deeper heel will help keep your sliding lower leg in place. I'd also horten your stirrups a big hole, especially at the large height you are jumping. This way you will have a lighter seat and you wont feel as though you have to throw your upper body forward to keep up with your horse over the larger jumps. Also, don't annticipate each jump by excessively folding with your uper body over the jump and at takeoff. At takeoff, you want to be off your horses front, so that he can rock back and get that front off the ground. Give him more of a release. He looks really restricted, and is unable to use his neck. He needs alot more rein.
Overall, just ride less agressively and more smoothly, even for a jumper course. Your horse needs to sitback before each fence, yet your body position is telling him to go go go.
Keep up the good work!