I'm watching and writing things down as I see them, so here we go!
First thing I would do is relax that outside hand. You are bumping her over subconsciusly with it. Keep it steady without pulling her or putting it on her neck, and really emphasize the bend with your inside at this stage. Very soft though, otherwise silly squiggy might get annoyed again. C:
Also, go ahead and bump your inside leg when you get about ten strides off the barrel. This will ask her to bend and support her shoulder, even going slow. Tap tap inside leg, then sit and hold on for the turn. It will help her a lot to emphasize that bend.
She is definitely bracing against you when you were haunch turning in the middle of the ground. I would get her going soft int he bridle, which if I remember right has always been something I've suggested for her. If you wanted, you could do a running or german martingale on loosely for a bit. Did you do this type of work on the ground? I.e. Tying her off to the saddle stirrups, draw reins on the lunge line, etc? Most people don't like doing that but that's because it's almost always done correctly, but it might help her find that softness and acceptance of the bit for awhile.
Another thing you are doing is still being a little fussy with your hands. When you trot up to the second barrel at 1:40ish, She goes to cut the barrel off and your inside hand comes up to move her out. The problem with that, is she may then associate the inside hand with lifting off the barrel and when you have to go to one hand eventually she may bow out instead of snapping in. Keep your inside hand to your hip in a turning position, and put a ton more weight in your outside stirrup and use your inside leg to lift. I mentioned inside leg earlier, and that will greatly help you with that as well.
As you are trotting after that as well, she is still blowing her hip while she is also bracing. Going in at your rate point, stop and push her hip in, then once her hip is clear of the barrel leaving it go ahead and push it in again. Don't be afraid to circle it a few times either, asking nicely for her to soften. I wanna share a pic of Selena, because she's the queen of this exercise, circling the barrel soft and hip in.
Although, I admit, my hand is not where it should be
All in all, remember your outside stirrup, relax your body and breathe her down, and get her to bend and relax and make perfect circles for now without getting too mad and nitpicky...It's hard to find that happy medium but I think you could do it.
She is doing better though, you both look nice.