In the late 1960s, video recorders became portable, leaving the television studio for the art gallery, the psychiatric hospital, and the streets. The technology of recording moving images on magnetic tape, previously of use only to broadcasters, became a tool for artistic expression, psychological experimentation, and political revolution. Video became portable not only materially but also culturally; it could be carried by an individual, but it could also be carried into institutions from the RAND Corporation to the Black Panther Party, from psychiatrists’ offices to art galleries, and from prisons to state-funded media access centers. Between 1967 and 1973, American videographers across many of these institutional contexts participated in...