You see that step (although not that pronounced) on slick gym floors when using a flat pitching rubber, because there's nothing to push from.
Sure that step is "game illegal", but pretty easy to fix. I'm surprised that for a skills video they aren't using a thicker pitching rubber to give her an edge to push from. She's on turf, so slipping shouldn't be an issue. For a skills video, they should be using what would allow her to show her best form! -Whether that be a turf mat, rubber mat or whatever. This is NOT the time to cut corners.
FASTBALL: Great energy and excellent arm speed. Good speed on the ball.
DROP: Decent spin, her drop "falls off the table".
DROP CURVE: - Drops more than curves = needs some work
KNUCKLE: Using for a knuckle/change? A little too fast, and seems to hang - needs to keep this pitch out of the zone (LOW), or it's going yard a LOT.
SCREW: Moves better than her curve = better spin.
CURVE: Very little movement, looks a lot like her drop. Needs work.
I'm impressed that she DIDN'T attempt to show a rise. Too many pitchers her age try to pass off a high fastball for a rise, but college coaches see that in a heartbeat. She has plenty of time to work on the rise.
I'd say she's well above average for her age, and definitely has DI potential. I'm surprised she didn't have a true changeup. Absence of a good changeup will hurt her, so I'd make that a priority. Good drop & screw.