He's obviously referring to people, there's no legitimate need for a courier to have a knife to deliver meat. And he knows it, he admits that it would be a problem if a cop saw it.
Also it's really telling that the biggest spike in viewing is when he's showing off the knife, seems everyone watching knows it's a weapon not an innocuous tool, you included. You fucking know he carries it because it's a weapon, just like he carries a bike lock on his hip, bouncing off his leg as he pedals instead of neatly stowed out of the way in the frame, because it's more accessible, as a weapon, on his hip.
The whole "dirtbag acab" punk scene is well documented and extremely pathetic. Bunch of middle-class kids whose lawyer dads still pay the rent so they can dress up as a caricature of the working class as a way of coping with not being born poor. Courier larping didn't pay for his holiday in the states, or that bike, or his drug habits.
It you want to know what an actual courier looks like, he's middle-aged, middle-eastern, on a moped, speaks shit English, smells like cigarettes, and lives with 4 other identically situated men with families back home. He's not a white FAGGOT on a surly with tattoos to hide the heroin needle marks.