She is leaping. Her drive foot does not drag.
The first part I'm not 100% sure I agree with. The second part is true with the caveat "from the rubber".
That said, the foot does NOT have to drag on the ground on a dirt field according to the rules. I'm paraphrasing, but the rules allow a pitcher to not drag as long as the height of the leap does not exceed what the ground level would be if there were no trench dug in front of the rubber.
I'm not convinced this pitcher leaps up above level ground without knowing if there was a trench in front of the rubber and/or how deep it was.
The push knee only points back and flexes if the pitcher has crow hopped.
This is simply not true.