So the title of this video is 'How to win a street fight with head movement" ..... Aaaand ... I am not going to comment on that.
The reason why I'm posting it is because I think it illustrates quite well how 'defensive' play is not the same as 'waiting'.
What I notice is how our man is setting up the rhythm, giving opportunities or openings for the hitter to take, and thus controlling the timing and giving himself a far better chance of evading the punches that if he just kinda hung out and tried to read his opponent's intent.
He's an active participant in creating his opponent's choices, and he does this by footwork, the occasional shove, and then with head movement. This means the guy who is trying to hit him is behind in the timing and forced to react to him as opposed to the other way around.
The subtlety is that he is not moving around in a predictable rhythm, he KNOWS from obvious previous experience where the probable next shots are going to come from if he moves in certain ways, and he calibrates the rhythm to his opponent so he himself is less readable.
It's the same with swordplay, though perhaps even more important when evasion is so crucial to one's wellbeing.
Perhaps 'creating' and 'waiting' might be better terms than 'offense' and 'defense' ..?