They were talking about the guy's older brother.
You have to understand that there is a very strict (and often violent) hierarchy within Arab/Persian etc. families, meaning the oldest male in the house is always in control. Whenever the father is not around, the oldest brother is in charge, ruling with an iron fist.
After being insulted by the guy who tried to get into the club, Michael Kuhr (the kick boxer bouncer) told the intruder that he knows his older brother (actually a close friend), and threatened to call him and tell him how disrespectful his little brother is acting towards a well known friend. The result? The little brother would have been mollywhopped real hard by the older brother for putting shame to their family by behaving in such an unpleasant manner. That's why he got all quite in the end of the video and tried to persuade Kuhr not to call him.
I had something like this happening to me.
Way back I used to hang with this dude from Pakistan from time to time and he had this 'reputation'.
One day I was hanging on a street corner as most teens did/do.
And his smaller brother started acting a tough guy around me and he didn't know me.
I knew who he was and started talking back to him. which he immediately replied "I'm going to get my brother!!" I told him he should go a head and do that. So he did.
When his brother showed up, they talked and the older brother pointed at me and asked him "Is that the guy" the smaller brother said "yes that's him".
On which he immediately got an ass whooping from his older brother and I was standing there laughing my ass off.
cool stroy breh!