Ok..I see the clip and I see what I need her to do, but how do I translate that to her? Should I be telling her that as she loads to allow her weight to come forward into the strong front side THEN release the hit hip?
this is how I think about it....
Find some type of short platform, such as one of those "steps" that are used for aerobic exercises. Get in a batting stance so that your rear foot/leg is on top of the platform and lift your front leg so that it is a few inches away from your rear leg but not touching anything. Basically dangling. Coil/turn/twist into your rear hip but resist with your core so that your belly button and sternum do not coil/turn/twist while your rear hip does. Now allow your body to stride toward the pitcher (front foot striding off the platform), but attempt to control the move out by utilizing the hip/core resistance you are creating. Instead of allowing yourself to simply fall forward, attempt to control the motion. Watch what happens with your shoulder line. NOTE: Also make sure that you are not too upright while doing this. Sit into your hips/butt as you are striding forward.
I hope that makes sense. I am not as good at explaining these things as some others on this site.