The cop was, admittedly, better, but he wasn't much better.
Glad that you noticed that
Perhaps you may also have noticed another evident element: his punches were not hurtful. So, you could afford close quarters, and since he was inclined to uppercuts (well, the other guy kept his head lowered and could see his arms instead than looking at him in right the face, so he was inviting
uppercuts...), find marvelous ways to his chin tip by hooks
- for with uppercuts his face sides are exposed to hook routes.
However, another thing immediately obvious - you could not count on making him run out of breath any soon... this is suggested not by the fact he is so forceful (guys who start fast may end fast, actually) but by the fact he is while keeping physical composure
(the guys who was beaten instead was very unorderly).
That (composure) spells for some factual experience.
At the end of the video the "cop" fires a good straight right - too bad we cannot see more to guess how he could behave or find himself comfortable with distance fighting.
All small things that you can process just within the first 10 seconds.
However, a person who is not used to fist fighting (and that was a regular street fist-fighitng, for which MMA or boxing experience makes the difference) would not last 2 minutes with that secuity guard. Less than one round and then it's over.