This video, Brussels Express: Bike Messengers, is really about more than bicycle messengers. It's about urban roadways, who uses them and how they can be used.
I like the notion of taking all the people who use Grand River Transit, all the people who walk or jog or push their baby strollers, and putting them, one person per car, into cars. Push those additional cars out into King Street or the Conestoga Parkway, and then ask yourself: what's the answer to urban gridlock? (If you think the answer is bigger roads, than just tear down every building lining King Street on either side, from Stirling Avenue to University Avenue, and you'll have all the pavement you'll need in our lifetimes. There will be nothing to do but drive up and down the street, but by George, you'll have your bigger road!)
I also like the video's notion that because a roadway is a shared facility, we all -- cyclists, motorists, peds, scooters, skateboards, inline skaters, delivery people -- we all are traffic.