This is awesome!
I'd say to, yes, get her to squeeze up better each rep - this will get more important as the weight gets heavier. The other issue that I see is that she's standing up a little early, as shown by the bar moving around her knees a bit. Encourage her to stay over the bar a little longer - another way we explain this is to tell the trainee that the very first motion in the DL is to push the floor away with the feet.
You get good son points.