You can tell Lachlan has been wrestling a lot. He's whole approach to grappling is more wrestling based than traditional bjj. Use bodyweight; immobolize opponent; get a dominant grip, and drive in regardless of opponent's resistance: if he let's you, you win. If he doesn't let you, he'll lose.
Lachlan, what is keeping him from trapping and rolling you over when you pull him to his side? This is an honest question. Not trying to be a smartass. Thank you.
What prevents the bottom person from extracting his arm (and putting it on the wrong side of your head) as you lift him up to clasp your hands behind his shoulder blade? At 6:10
I suspect you don't really need to clasp your hands to finish. Perhaps you can instead leave your right arm free and block the victim's left arm as you slide your head into place.
Doesn't the next step address that, where he blocks his arm by driving his head forward and "around the corner" to block the arm? I assume those are done in pretty quick succession when applying the technique and only separated for demonstration.