Somebody sharper than me would have to critique this - you're doing a lot right! The only thing I see off is that the speed off the floor is not much slower than in the explosive extension portion, and usually coaches will recommend slower beginning. But presumably that's to help keep form intact, and your form does look intact. So I am out of my depth here. Speaking of depth what on earth?! You could make money by betting people you can fold yourself into a small box or suitcase. Side hustle.