The music is way too loud/ distracting for me, personally.

Also, you say that he's in training for jumping as well yet you do not show him jumping. That sends a red flag.

He is extremely cute and a nice little mover. I would just try and get pics/video of him jumping some as well, unless you're marketing him only for dressage. That, however, would be strange since you have him with an eventing trainer.

Good luck and sorry you have to sell one of yours

The moment that you stop being an advocate for your horse(s) is the precise moment when you should not be the one responsible for them.