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Street fights
The video keeps looping, but it shows 1 guy versus 3-4 other guys.
Technique used: Mostly boxing
Notice his leg stance, generating power to his punches. This guy actually goes on the offensive all the time.
There is one OTHER martial art which I can think of which is applicable to this scene. Jeet Kune Do.
Jeet Kune Do is the way of the intercepting fist which in essence is, in Bruce Lee's own words:
"Forget about winning and losing; forget about pride and pain. Let your opponent graze your skin and you smash into his flesh; let him smash into your flesh and you fracture his bones; let him fracture your bones and you take his life. Do not be concerned with escaping safely; lay your life before him."
This is real JKD in action. Remember JKD is NOT a system, it is a philosophy.