I honestly cannot see paying for yoga lessons on a horse, but I'm a 58 year old guy who has trouble looking behind him when riding. Lots of books have stretching exercises that can be done on horseback. Heck, the US Cavalry taught them, so they are nothing new. I don't do them horseback, but I have a strong saddle stand and have started doing them in the saddle during the evenings. It seems to cut down how long it takes me to relax and loosen up when I start riding, and I think everyone agrees a loose, relaxed rider rides better than someone who looks like he is wearing a body cast.
Another thread has been discussing what prepares a person to ride a spooking horse (https://www.horseforum.com/member-jou...6/#post8964361
). If the ideas on it are accurate, then things like balancing on one leg while moving the other around would also help. IOW, the old guy with a stiff back suspects yoga (or martial arts) would be helpful to a lot of older riders. Someone who has trouble getting their confidence back after a nasty fall might consider a semester of yoga lessons at a community college as both a step toward riding better AND getting their confidence back.
But from watching the video, this is about YOGA done on a horse, not yoga done to help one ride a horse. I wouldn't do it as a means of riding better, but it may beat paying $50 for 40 minutes of massage. I started jogging in 1972, and jogging tends to tighten the hips. 15 minutes on a walking horse loosens my hip better than ANY stretching regimen I've tried over the years.
So while it made me laugh, I can see it as a form of therapy or yoga-focused training. Me? I'm about to take 800mg of Motrin, and try to get a ride in today before the winds pick up. Between the Motrin and the ride, I'll sit in the saddle on the saddle stand and try to stretch a little. I owe that much to my horse, and maybe myself.