I cannot speak for anyone but myself. What I think is so upsetting in this video and wrong in any situation where one is dealing with another species is that:
This horse is in a state of panick. He kicks out at her because he is fearing for his life. He is terrified. He screams terror with his facial expressions and body movement. That is what I see.
He does not feel anything but fear about that woman. She is not interacting with him at all. Her focus is in and out with him. She is mostly talking to either the camera man or thinking about something smart to say instead of thinking about the horse and how the horse feels.
The horse doesn't know if she is going to kill him or not. She hurts him and he doesn't know why, other than that he is a prey species and she is a predator.
There is no relationship between the two of them. Just fear and more fear. She has no empathy or understanding of this horse or what she is doing.
She needs to learn back from the begining. First off she needs to understand what it is to be someone other than her. She needs to know that what she does to an animal hurts that animal etc. She needs to learn basic life skills and empathy skills before she sets foot near any other living creature.
If your horse is in a state of flight, as this horse is, you need to understand that and work with an individual who has had years of experience and education to help you communicate with that horse so that further damage doesn't get done.
With my horse, I didn't realize that until she got hurt. Now I know and I work from there foward. But had I known......I could of avoided so much pain and trauma done to my horse.
When you have a 1000lb animal that is a prey species in a flight mode not allowed to fly (so to speak) you will get hurt, the horse will get hurt. No exception.
Horses are not dogs. Not at all. That you must immediately change your thinking on. They are nothing alike. A dog is a preditor. End of story. They are driven by food rewards and they like to chase. Their reward centers are much different and they respond to stress differently. They also weigh much less and will do less damage than a horse if panicked. (for the most part).
If you must think of a horse as a domestic animal, then they are closer in behavior to a cat. But a cat is a predator/prey species so still the behavior is way different. Think of a feral panicked cat and how much damage they can do. A horse is 1,000lbs of that kind of panick.
Hope this helps. Sorry it is so long.
I think something to thik about is what kind of leader do you like to follow. A calm, in control intelligent individual who never ever panicks or sounds flustered or rushed. Always in control and kind yet strong. That is what horses want. They don't want to be bullied or beat up or dominated. They want to follow the one they trust and the one who knows what to do. If you are not that person then pretend to be until you become that person.
I hope someone can explain this better as I am not sure what I am trying to say is coming across right.