Found this while looking for instructional videos on horseback riding (so I can improve my seat, cuz I need to work out some physio-mechanical problems on my end). Yes, this guy obviously has issues with women. If you can ignore his misogynistic comments, the rest of what he's saying is really informative (it was to me, anyway). Also, based on one particular comment, I suspect he rides western rather than english- nothing wrong with that except the whole snide comment about "women who just want to ride and wear their tight pants and shiny boots"; because there are men out there who don't get horse behavior either. I think what he describes are people in general who board their horses and only come out once a week (MAYBE) to ride their horse- and that's really all they care about. They don't care about learning horse behavior/psychology or major care. They just want convenient access to riding for pleasure whenever they want.
As a woman, I thought most of his comments were amusing- one because they're stereotypical and two because I don't give a shit what he thinks about women; I'm not dating him so it doesn't matter and three because I will say that women are more likely to anthropomorphize their horses (pets in general, really) than men. We have more emotion circuitry than men; we are much better at picking up on and giving social cues than men. And since people tend to be human-centric, many of us are going to try to interpret animal behaviors in human terms/psychology. And it just doesn't work.
That's most of the reason you get problem behaviors in any animal. People don't understand that they are a different species and have a different mindset about certain things (even though there are also a lot of similarities), and the way to get the animal to understand what you want is to speak to it in a way it understands. If a dog is misbehaving, for example, it is almost always the fault of the owner. The don't understand the dog's perspective and inadvertently end up reinforcing the unwanted behavior without realizing it or punishing for behavior that, while not necessarily desired, isn't unreasonable for the dog and really just needs a patient correction to tell the dog "this isn't ok here, with us". Some dogs have drives bred into them- aggression, herding, prey drive- that cannot be stomped out of them, cannot be trained out 100%. It's impossible, it's part of the dog's genetic code. What you can do is place precautions to prevent unwanted, instinctive behavior (such as herding your horses and creating mayhem, like my friend's cattle dog does), and/or train the dog in a way that will limit those unwanted behaviors (again, the cattle dog: I'm currently working on teaching him when it's ok to herd- basically when someone tells him to- versus when it isn't- when someone says no and calls him out of the pasture.) If you have a working bred dog that is meant to be aggressive- there's no chance of you training that out of the dog. If you invested in a training to do some protection dog training with your dog, you might be able to get a little better hold of it- or you might just create a more lethal dog; it's hard to say. Best you can do is keep a firm hand with the dog, make sure the dog respects you and is attentive to you- and put precautions in place, such as muzzles when there are visitors or, if specifically dog aggressive, not taking your dog to a dog park, etc.