(If you are having issues with the video, please click here for alternate.)
If you want, watch the video with audio and then mute. I want you to watch the body language of the attackers and how can you see their decision-making process that lead to the beat-down of the couple.
I noticed that the pack was following, possibly taunting them. The couple was already perceived as possibly weak, but they needed to make sure. The couple allows to be “cornered” and the male separates from the female and one of the predators does a test run. The male returns to the female and instead of going aggressive at the attack, it engages in a passive embrace/shield with the female. Again he leaves the female (I have no frigging idea why) and this is the clue for the pack to initiate the attack: they fall on the woman and one comes from a blind spot and punches her. Again the male has the chance to go into hyper aggressive drive to change the dynamics of the encounter, but fails to do so and he is now (rightfully) perceived as target. About the only good thing that the male’s passiveness brings is that the pack goes chasing after him.
Then we see a smaller male coming out of the building, but he is not a grass-grazer and confronts the pack. The predators still manage to get a couple of more licks on the first male, but they eventually leave at the instance of the second male.
Lesson to learn: If you look like food, you will be eaten.