Folkstreams Is Amazing

full video here

Sadobabies: Runaways in San Francisco
a 1988 documentary following a group of homeless teenagers who occupy a series of abandoned buildings in San Francisco.
Many were forced to leave abusive families, but managed to find a supportive family environment in the company of other runaways.

full video here
Possum Trot: the Life and Work of Calvin Black, 1903-1972,
from 1977, documents Calvin Black's epic sculpture/architecture/theater project in California's Mojave Desert.