The National Film Board of Canada has just uploaded portions of their catalog online. In 23 Skidoo (1964), director Julian Biggs trains a moving camera across a startlingly empty cityscape. Habitation is extremely recent. A pair of broken glasses sits on a sidewalk as if they had just been dropped. Police streamers wave in the air next to upended police barriers. Towards the end of the film, a single medium shot explains the predicament.
Be sure and check out other offerings on the Film Board's website.