I agree with drop bear on range.
The video title says this is for fighting taller attackers.
Bad idea to stand immobile at the end of their punching range (right where they want you), where they can hit you, but you can't hit them.
In the first exchange, the defender plants his feet in a super wide stance and does the matrix to avoid and swivel around those punches.
Vulnerable to all sorts of things doing that, not the least of which is that left punch that looks like it could well have landed if the attacker intended it to (might even have landed), and knew how to punch...
At the same time, the defender is also reaching out and chasing the hands which leaves him with arms away from his head while doing the matrix which doesn't move his head far enough to avoid the punches.
I think if any of those punches had had intent, they likely all would have landed. At least the jab-cross combo would have knocked him out before he got outside of the third punch.
Tactics in the second exchange were much better, but I don't know why the attacker bent over to hide for no reason before even being hit. Defender also goes up on his toes to overreach, which means not as much power, and again vulnerable if he's not fighting a coward.
Better footwork and management of range needed so that when you enter it can be in a mobile, but solid stance and at the right range for you to counter.
