Here's the description of the video from YouTube:
Some crazy drunk guy attacked me on Wall Street late at night. He threw a punch at me so I punched him down to the ground in self defense. He followed me back to my building and attacked me again inside, which is caught on tape. I used BJJ to neutralize him until the police came. There are about 6 seconds missing due to the apartment building's crappy copying where I ground and pounded him. Very bloody, but you can't see it from the video. Big shout out to Anderson's Martial Arts Academy in NYC where I train! Compared to my training partners, this guy was easy pickins'. FYI, I'm 5'6'' 180 lbs and this guy was like 6 foot and 210 lbs. In addition to being an MMA enthusiast, I'm also an attorney. Bad luck for him.