While there’s little actual live footage of anarchist agit-propsters Crass floating around online (see bottom for a rare example), there’s plenty of available footage from Christ: The Movie, the collection of experimental shorts put together by Crass collective member, Mike Duffield. As All Movie says of the shorts:
As with most things Crass, some of it’s harsh, some of it’s lovely, and the transitions between the two come whiplash fast.
They were designed to be shown on-stage during Crass’ live performances. The films are accompanied by music the group recorded for their album Yes Sir, I Will, a 1983 polemic on the ideas and realities behind the War in the Falklands.