Looking at the second pic - you really need to work on keeping your eyes up. You end up where you are looking - so look ahead, not on the ground or you may end up there.
On your approach to the jump, try to have your pace (canter or trot) established for multiple strides (like 6+) before the jump. A number of times you seemed to just take off going towards it, and hit your pace 1 - 2 strides before. You really need a consistent pace whenever you are working, and if you ask him to speed up only a few strides out, you may inadvertently teach him to rush the jumps. Not something you want to happen.
On the landing, work on keeping him straight. He turned sharply left on you during the vid, and besides making it hard to stay on coarse, it can eventually unseat you if he does it unexpectedly - which they will (saw it happen this weekend). Pick a point far away, like towards the far fence in the riding area, and canter away from the jump to it in a straight line, and then stop.
I hope this helps some, I'm sure other people will have other ideas also. These are just the first things I would work on personally.