In normal combat situation, when you make 1 move, your opponent will make 1 move too. When your opponent punches you (move 1), you block it (move 1), your opponent will make his next move (move 2) as:
- use his punching arm to pull your blocking arm, or
- drop his punching arm elbow at your head (since you only block on his forearm and his elbow joint is free), or
- use his other hand to punch your head, or
- ...
before you will have chance to punch back (move 2), None of those normal responds are shown in your clip. IMO, it's un-realistic to assume that your opponent will freeze his punching arm in the thin air and allow you to have time to do your move 1, move 2, and ...
In other words, you should wait for your opponent to make his move 2 before you can have change to make your move 2 (unless you are twice as fast as your opponent). So the normal respond should be:
- Your opponent punches,
- You block,
- He responds to your block (not shown in your clip),
- You respond to his respond,
- He ...
- ...
Of course you can combine your block and punch in 1 move since 1 is better than 1,2, but that's not that easy to do in combat reality since a punch can be as fast as 1/10 second.