Geez, he's cute! As you say, a side view would be easier to judge, but from what I can see, he's using himself well. Nice bascule, but it really looks like he's hanging his knees. It's very hard to tell from the video, but it looks like all the action is coming from his shoulder to get his legs up, but doesn't follow through with his knees. At the apex of the jump, his feet and forearms are tucked way back under him, rather than having his knees up and under his chin. I could be completely wrong, because initially, I thought his knees were up. The front legs get in a shadow and it's hard to tell where they are against his dark body.
He looks like he's having fun and that's very important. If you have the chance, try to video him from the side. I'd really like to see him from that angle. Also, find another pole, or something to use as a ground line to help him judge the height of the jump.