The brawl was captured by Corey Hour, a Phoenix, Arizona-based videographer who was sitting a few rows behind the men.
The plane was scheduled to fly from Tokyo's Narita International Airport to Los Angeles International Airport but had not yet taken off when a man in a red shirt abruptly turned around and told a passenger in a gray T-shirt that he was "going to kill him," according to Hour.
After leaving the plane, the unruly passenger reportedly choked a male All Nippon Airways employee, according to Japan Today, and was arrested and charged with assault.
The incident caused a public relations crisis for United, which initially defended itself by stating that the passenger, David Dao, had "refused to leave the aircraft voluntarily." A few weeks later, American Airlines grounded a flight attendant after a video showed a confrontation between him and another passenger, allegedly after removing a woman's baby stroller from the plane.
The airline said the pilot was trying to break up a fight.