I don't quite remember how things were when you posted earlier, so forgive me if I dont' truly appreciate how far you have come.
In the video she is certainly backing nicely off of your body language. The only I saw there was in the third time that you sent her back, when she hesitated, for some reason you backed away, one small step. But otherwise, looked good. If you can back her even more, while your feet stay in one place and you move her away from you a step or two more, you could then start laying the rope on the ground and work that into teaching her to ground tie.
As for her getting fizzy when you are on, and worrysome with turn on haunches and such, I wonder if that has more to do with her still not being comfortable with things rubbing on her sides, like your leg/boot. Maybe doing some more work with having stuff up against her, flopping on her as you go to work her on lunge or in round pen so that she is less worried about pressure and activity along her sensitive sides.