hey dude that's great! looks like she'll be hooked in no time
pulling to the left like she does is fine to start off with - a heelside cut is the most comfortable for beginners, but, if she really wants to get back behind the boat, she needs to turn her front hip back the way she wants to go. that front hip (left for her) is what will contol her direction. at the moment her hip is pointing out to the left of the boat, and so the whole board is going that way too, so that even when she tries to turn the board back towards the boat, that hip is stil pointing away from it, and that's why she's getting nowhere. she needs to turn that front hip so that it's pointing back towards the boat, and then she shouldn't even need to cut much - she'll just start drifting back into the middle.
hope that made some sense... let me know if not and I'll try again!