I think it’s important for people to realize how this works. The key is that a ziptie is only locked by a tiny little plastic tab inside the head that ratchets along the ribbed underside. Twisting your arms won’t break the zip tie because you’re applying force to the strong part of the tie (the strap itself), but a sharp, sudden jerk down the axis of the tie will snap that plastic tab.
So the idea is to jerk your wrists apart as strongly and sharply as possible, in this case using your body as a wedge to transform downward motion into outward motion.
Don’t just copy the technique, understand how and why it works.