I don't know 4 sure but it looks like he was re-directing angles and using footwork to keep these guys in a straight linear line. You are right though about this being a popular video. I found it on youtube under Krav maga.
this video is a popular video, seen this on several websites.
nice example of the boxing platform being used in a street-level application.
multiple attackers who didn't know how to fight. Essentially they came at the single fighter in a straight linear line, one after the other. The boxer was able to maintain distance so they had to come to him.
Simple boxing strikes to the head were used, with great effectiveness. The attackers did not have their hands up in any defensive manner, and so were open to his return-fire.
Hehehe it was kind of like a bag-drill really. The single defender was lucky no one attacked him from behind, or had a weapon.