This is RS, a fellow masters lifter, with a 55lb double.
Things I notice in this video: the arm bend is a little early and arms are still a little bent in receiving position. Technically this is more of a power snatch (receipt with knees above 90 degrees) with an immediate overhead squat (OHSq). Feet are going a little wide which is fine at this weight, but may make it hard to come out of the hole when the weights get heavier.
A good drill for addressing both the early arm bend and feet going wide is the “no hands, no feet drill”. Without a hook grip (this will help improve grip strength as well) and without moving feet, perform a snatch from the floor. It forces a good hip drive because you can’t cheat by getting under the bar by spreading feet wide and you can focus on the turnover without the hook grip.
A video demonstrating that drill with Jon North and Donny Shankle can be found here: https://www.youtube.com/watch?v=ProSkFvyWHA
Ooh! Love the idea of that video!!! Thanks for posting that!