Thats the reason I said I personally would like to see a entire swing, before making any judgements.Need to get the sequence right first. Stone feet together stride hit drill will help.
I'm probably going to take some grief for this post, but I'm making it anyway. My son had a huge problem with bat drag. We solved it in a matter of weeks using a homemade version of the Bat Drag Buster. The commercial version is here: https://baseballrebellion.com/product/bat-drag-buster/?utm_source=adwords&utm_medium=ppc&utm_campaign=**LP+Branded&utm_term=bat drag buster&hsa_tgt=kwd-927771547678&hsa_grp=101571269902&hsa_mt=e&hsa_cam=10557199193&hsa_ver=3&hsa_src=g&hsa_net=adwords&hsa_kw=bat drag buster&hsa_acc=1999314549&hsa_ad=448667917842&gclid=Cj0KCQjwsqmEBhDiARIsANV8H3YPJexkNtg8CyKxkWfXB_jcjzMnsVyjTgBb3Gnd6U1gJAesr-0ulL8aAqErEALw_wcB. However, I made one myself with some $5.00 ankle straps from Academy Sports (https://www.academy.com/shop/pdp/gofit-tube-band-ankle-strap-with-carabiner?repChildCatid=882604) and some rubber bands. You can find some Youtube videos on how to use the Bat Drag Buster and/or a cheap homemade knock-off. It worked, and it worked quickly.
All of that being said, I would not solve the problem the same way again. The device teaches a very "connected" type swing, which most people probably applaud. It teaches the hitter to basically just hold the arm position the hitter has at launch, with the exception of the rear elbow coming down to the side. The reason I wouldn't correct the problem that way again is because I have since evolved into believing that the hands need to be actively used in the swing, like throwing the hands/knob toward the ball. I would suggest (and this is likely where people would disagree) that your daughter should be taught to throw the knob and/or her hands at the ball. It's not possible to both correctly throw the knob at the ball and have bat drag.
But, if you want a "connected" swing that minimizes the use of the hands, the Bat Drag Buster or your own cheap homemade knockoff will do the trick. At least it did for my son.
Here are a couple examples of a drill DD has worked on that she has gotten some success out of. I hadn't seen or heard of it til last fall. Some say they don't like it some do.
Some more food for thought
Have not seen very many videos where someone isn't trying to strut or sell their stuff.everyone one of this guys videos is geared to get you to buy his stuff. He likes to ridicule etc etc. gives you half of the info. pure money grab.
not saying I don’t agree w some of his stuff.