In one simple video, along with some basic facts, they proved that:

• Bike lanes take up way less space than the car lanes; imagine what our cities would look like if you could reclaim 1-3 car lanes and make them public spaces!
• Bike riders, even in greater numbers, never cause gridlock.
• The cost of those bike lanes is a fraction of that of the roads.
• Quite a few of those cyclists panniers and backpacks, which means they were using their bikes for more than fitness.
• Car infrastructure (those traffic lights) slowed down cars and cyclists. And I'm willing to bet that if there was no car infrastructure, cyclists could get around a city much faster than cars ever could.
• There is obvious demand for cycling infrastructure. This is a Canadian city, and one that likely isn't as developed as some European ones, yet the demand is clear.
• While you can't see faces, you can see that there's a diversity of cyclists (ages) and abilities.
• Hard to validate without a survey, but I'm willing to bet that out of those 567 cyclists, I'm sure a good chunk wouldn't be able to afford the cost of car ownership. So, cycling is giving them an accessible and affordable way to travel.