Good heavens... I just found a version of the original video that my computer will allow me to watch.
That horse is an absolute saint. My guy would have stomped her under the circumstances, methinks, and he has excellent manners, at least by my standards and for the most part. I saw nothing any more dangerous than any other good sized horse investigating a new situation. So much for "phases", rhythm, not acting predatory (I'd have run from her, and I'm a predator, too), and release of pressure. Way to go, LP.