One looks like he's in his 20's or 30's. The other one was an older guy in a red Hawaiian shirt. Apparently he started it.
A passenger behind them got part of it on video. He says the guy in the red shirt asked the other guy where he was from . . . then immediately said, "I'm going to KILL you" and attacked him. Drunk?
A female flight attendant tried to break it up. Eventually the guy with the camera stopped recording and stepped in.