I noticed that when you were doing that cork you extended your ankle pretty early, making you lean back too far. Being on your toe as you swing also gives you less spin, because your foot will pivot and cancel out the momentum you get from throwing your arms to the side
I'd recommend you experiment with holding your ankle until later in the setup, and then extending it so that your foot stays flat on the ground until the last moment and gives you more spin. It'll take you a while to figure out the timing, but once you do it makes corks so much easier and gives you a fuckton more momentum and height to work with. I've put an example of one of my corks, if it helps you figure it out at all. Overall good progression my guy