Wow, that was painful. I hope she is smart, because she isn't getting any tennis scholarship.
John Wooden, the greatest basketball coach of all time, said the three steps to learning in sport are explanation, demonstration and repetition. This girl needs to have proper movement explained to her, then demonstrated, then she needs to be drilled constantly on it. Only then can you honestly say she is lazy. It's possible she thinks she is moving like a deer on the court.
There is an overall lackadaisical nature to all her strokes. Her serve has several technical faults as well. Her shoulders rotate too horizontally for example.
I have to agree with LeeD. This is not coaching. This is just a hitting session and not a very good one. At the least, it seems to me to deliver honest value, you have to structure a session with some drilling on various strokes and also some work on constructing points, ie directionals, where to recover to, etc. Now she is just hitting aimlessly. It doesn't help that you are making so many UEs.
I hate to be so critical, but if you are expecting to earn money coaching, you need to take it more seriously.