If we went to the coach in this video and she started teaching my DD step lunge hello elbow then stepping thru with the drag foot high we would definitely be one and done.LOL
Having been to this instructor and other instructors there I do know they don't teach any of these things. But they do use drills such as the one shown to work on specific things that the student is struggling with. Maybe not the best 'model' pitcher they chose (I don't know the girl shown) but their methods have produced some unbelievably good pitchers over the years.
KenB - I haven't watched a lot of the videos online from Jen but I suspect that the individual drills may make less sense outside the lessons itself.
I will say the improvement in my DD's pitching has been significant in the past few months after being in a bit of a rut with her previous PC. So far I have been very impressed with how they communicate and teach pitching and how it is very much inline with the information I have read on this board. It is actually one of the reasons I ended up using them.