With a hide-the-ball pre-motion, you have to be careful to not let the arms get ahead of the legs. When the arms get ahead of the legs like you see above then you have an issue with timing.
We work on Arm Mechanics, Drive Mechanics, then work to put it all together in a full pitch.
Regarding her arm mechanics, it is hard for me to provide any meaningful feedback. The quality of the video is very poor. I can't tell, even stepping through the video one frame at at time if she is getting good IR and Arm whip.
Regarding her drive mechanics,
-does her pre-motion promote the feeling of a running start?
-does she get into a good sprinter's position?
-is she getting a good weight/momentum transfer?
-at 3:00 you look to see if she is detaching from the pitcher's plate with good drive and stride leg extension.
-does she create a firm front side as she lands?
Regarding putting it all together,
-currently, she has timing issues (mentioned above).
-does she have a good posture that promotes brush interference?
-does her drive leg come through forcefully, or is it left behind hindering a firm front side?
Excellent advise!!!!! Awesome response