That "Race Among The Ruins" performance was from "Olympic Team Benefit," June of 1976. Taped at Maple Leafs Garden in Toronto, with guest: Murray McLauchlan, Sylvia Tyson, and Liona Boyd. I have tried many places to find this concert. I saw it when it ran in '76' but did not have a VCR/DVD recorder in those days. Really great concert Next Saturday, hope to be able to get it one day.
http://www.lightfoot.ca/benefits.htm
And the walking about in the 70's looked like some kind of documentary from CBC ?