First off, you are pulling incredibly too much on that horse's head. If your horse is pulling at the bit that you need to hold her back that much then you should either change bits or occupations, as in what you and horse horse show. Secondly, you shouldn't kick your horse and pull back, it is fairly confusing to them and it can result in things like rearing, such as your horse did. Thirdly, don't pull on your horse when it is rearing, it can make them lose their balance and topple on top of you. Fourth, in the beginning of your video, you were riding one handed, just thought I would point out that you are riding english and english is two handed. And fifth, not to be rude at all but your horses headset wasn't so great. Now I of course don't know what you teach your horse and whether or not you work on headsets so I just want you to know I'm not trying to be mean, rude, or whatever, I'm speaking my mind. But most of your "bad riding day" was all because of mistakes you made and it wouldn't hurt to fix them.
"Doing what you like is freedom, liking what you do is happiness."