I really like how still and quiet you are on your horse!
Put your hands more together and more in front and up. But you already know this :)
These are very small jumps, so I would say your tempo is really nice. There is no need for more speed, and you have good energy. As "Michelle and Mr B" said, you could have a bit more energy, however personally I think it looks great. However it's true that you should sit more still in your seat, so instead get the right energy before you start your course. Nudge your horse forwards with your legs, and meet up at the reins, so he becomes a little more collected and use your seat a little to keep driving him forward. Then start your course. This will also make your horse jump more together and upward (again, the jumps are not so high so you do not really need this so much now).
Another thing I want to praise you on is how little you move over the jump! I know some people throw themselves forward, but it is the horse that needs to come up to you, not you go down on the horse. So keep that up. If your curve your back just a little before the jumps (and when I say "curve" I mean stick your stomach in and make your back completely flat and straight), you will notice that without moving a muscle, and just standing in your stirrups, you will not fall behind over jumps, and you will stay in the right position over your horse. You have a good position now as well, but I found this to be good advice especially when the jumps get higher :)
Last thing, make sure your reins don't become too loose over some jumps. Yes you should give the horse a little rein over the jumps, but when they are so small and the horse doesn't get so much air, you should actually keep contact the whole time - just a little looser contact right over the jump, but otherwise don't loosen too much.
Otherwise it was a pleasant ride to watch, well done! And your horse looks very honest :)
"When I bestride him, I soar, I am a hawk: he trots the air; the earth sings when he touches it; the basest horn of his hoof is more musical than the pipe of Hermes." -Shakespeare