Well, I am not a western pleasure rider, so take that into account.
She is doing pretty well, all in all. To me, it's a bit of a chair seat, but I know that is typical in a lot of Western riding. I see her frequently encouraging the hrose to lower his head by a gently pull of the reins, and to be honest, I thought the horse's head position BEFORE being corrected was right where I would want it to be . Also, I saw the back of the saddle popping up and down with the canter quite a bit. Kind of hard to see 'cause video is not in great focus, but wonder why it's popping up and down so much.
Rider looks confident and calm and sits uprigtht and looks forward.