He's a cutie. Glad you're having fun with him.
Watching him, I felt like he was out jogging in the morning on the track. He still holds his head like he's wearing an overcheck. lol Just a matter of musculature. It didn't take much to picture you behind him in a jog cart.
Watching the video, I really think some time out of the arena would help. Any chance that someone can take him on trails? Miles and miles of trails?
I know you didn't ask for suggestions, and it's nothing to me if you try mine or not, I just think it would help your guy move better.