I'm not much of a jumper, so take my comments with a grain of salt. xD
1) From 1:40-1:50ish something seems a little off about your riding to me. Idunno. It just seems a little handsy, if that makes sense. Like you're riding more with your hands than your seat.
2) It might just be because I do dressage and not jumping, but something seems a little strange to me about the way he carries his head when you're going through the course.
3) He looks really powerful. And you look like you're having a blast. =)
"There's no such thing as a problem horse. Just people that cause problems for horses." - Unknown