Based on the evidence provided here the old man defending himself against two attackers in this video should register his right hand as a deadly weapon. The footage, captured by an onlooker from a nearby balcony, begins with a verbal confrontation between the old man and a younger individual wearing a baseball cap.
The younger man starts the physical altercation by slapping the older man in the face, not once, but twice. That prompts the older gentleman to raise his fists in order to defend himself, and the two then briefly circle each other. The aggressor starts to load up on a big strike, but before he has a chance to unleash it the old man counters with a brutal straight right to the chin that instantly knocks him out, sending him to the concrete with an audible thud.
Thankfully the old man shows some restraint and doesn’t continue to beat on his attacker as he’s out cold, and indeed would remain so for the remainder of the video. At this stage, it appears that the incident is over. However, just as things are cooling down another man in a red shirt then appears wielding a metal tool as a weapon.
The stakes are raised now, but as it turns out the old man is more than up to the challenge, despite the odds now being further stacked against him. As the attacker swings at him, the old man neatly slips under the arc of the incoming blow, then uncorks that piston-like straight again, dropping the second assailant hard on his butt.
Bystanders then intervene to ensure there’s no further fighting between the two men, and presumably, if there were any other attackers waiting in the wings then they think better of it and bid a hasty retreat rather than attempting to go toe-to-toe with this elderly assassin!