Not sure how old he is, but he seems like he's within his first few years of jumping because of how he doesn't lower his neck. However, it could be that he's been caught in the mouth a few times over a jump and has just learned that he shouldn't stretch his neck down and out. He's got a great front end, seems to not be so tight with his hooves though, but he should learn to clean that up as he becomes more experience and starts to jump bigger. And as time goes by he should learn to drop his head more and then he's knees are going to be up to his eyeballs it seems like.
You can see that he has a lot of scope in him too!! Overall I say he'd make an amazing hunter.
While Riding A Horse, We Borrow Freedom