Welcome to the forum! Your horse is very cute :)
Unfortunately, those photos really don't show us anything. 1) Cannot assess conformation on a moving animal. 2) The jump is so tiny that you cannot discern anything about movement over it. I do like, however, that if the photos are posted chronologically, that it shows your horse going from "OMG SUPERMANJUMP!" to "no biggie canter pole" where he got to the pole in a much better manner.
From the second photo, though, I think he's quite cute :)
He is a little sickle hocked and a bit straight in the hind leg. He looks a little long in the coupling and looks to have large, roomy hocks. He seems to have good bone.
You really need to have three people and get a proper photo of him for anything further. He needs to stand with his legs toward the camer plumb and the legs away from the camera such that his front leg is a little back (space to the knees) and the rear leg is a little forward (space to the hocks). The photographer needs to stand opposite the horse's hip and the horse's body needs to be parallel to the film plane. He needs to stand on level, firm ground.
To get this one person operates the camera. One person sets up and holds the horse and a third person is out of the picture doing whatever they can to get the horse to look at them with ears forward. Head needs to be up with the nose at the same height as the middle to upper part of the shoulder blade.....