I don’t post in this section often, but I’ve been through the ringer with one tough customer who was VERY much like this. Your first riding video gave me chills, it was so similar. Now am facing round two with a new guy who’s throwing a lot of the same at me. Apparently, my taste in horses is almost as bad as my taste in men.
I could write a novel on both boys, but I’ll cut to the chase. Both are athletic as heck, but have soreness issues. Both are smart, sensitive and untrusting. Both had bad starts and rough pasts. Both suffered from ulcers.
Both horses were totally shut off to wanting to participate or cooperate. Both wanted to quit the rider and were damn dirty about it. The key to breaking down the resistance in both horses was totally giving up on trying to make any measurable progress and instead just seeking a happy place.
For both of them, I found it in in-hand work. Teaching softening, suppling, moving “through” and learning laterals. Both horses benefited from quick easy lessons on the ground. Lots of atta-boys, lots of scriches and loving, no admonishment for making mistakes - but being firm and not allowing bullying. Being incredibly patient and calm while they acted out their tantrums.
Suppling their bodies on the ground took away the angst of a rider up. Working in hand rather than on the longe made work more interesting and fun, not tedious circles. No side reins, no demands in the beginning. Short lessons, ending abruptly and calling it a day at a happy point, kept them interested and eager for the next lesson.
Both horses were so used to their jobs being miserable, painful, confusing, scary that they had just shut down wanting to learn at all. Once fun and happiness was restored, putting them back to real work was easy and progress happened quickly. They were supple in their bodies and mind, listening and soft.
Interestingly, both horses responded most to learning lateral work in hand, and for both its our go-to happy place if they get upset.
Horse #1 turned out to have broken withers and now is happily driving. Horse #2 I suspect a stifle issue, though he’s been cleared by a vet. In hand work is making him softer in the mind, more willing and is translating very well to ridden work. After a few months of strengthening and suppling I’ll see if I feel his stifle is still an issue and reassess then.
I wish you luck!