Here is traffic anarchy in full splendor. By today's standards this not congestion, everything and everbody keeps moving. While there are no apparent traffic controls, people seem to follow accepted rules of the road. Everyone and every vehicle shares the street - trolleys, horsedrawn wagons, pedestrians, bicyclists and automobiles. It's pretty exciting stuff. You see why later generations of traffic engineers went full bore to get the street under control and optimized for cars and trucks, to the exclusion of everybody else.
The present generation is pushing back against the auto-dominate engineering regime - hence the rise of Complete Streets, bus rapid transit, bicycles, traffic calming, and pedestrianism. The video adds a historical frame of reference, a starting benchmark, to consider for the future.
Complete reference for film