I'm going to have to disagree that its like dressage. A dressage horse has a lot of contact through the seat and legs, which tell the horse everything it needs to know while driving it forward into the bit, where the horse then bends. Everything from the walk and all the way up to canter pirroutte is communicated through the rider's seat, weight, legs and timing.
That's why I'm confused. I don't see any communication at all through any aids a rider would normally use. Theres no collection in the walker we just watched.
And those who were seen dancing were thought to be insane by those who could not hear the music