That is TTB.
I am about as far from a swing expert as you can get, so I won't offer any tech advice. However, and maybe it's just the angle from the camera, but is she swinging too long of a bat? A bat that is better fitted to her height may be easier to control and lessen the bat drop/drag.
[MENTION=14754]pattar[/MENTION], my wife decided that holidays require something called "family time" and put her foot down when DD and I tried to sneak off to go hit, so I'll try and get a full speed video tonight at practice.
I would start with her back foot, it is sliding back. .
Inside pitch and she isn't Trout.