In 1969, John Lennon and Yoko Ono made a film called Bed Peace which was a documentary about their then-current efforts to bring some peace and sanity to a world that needed loads of both. It features them in conversation with prominent figures of the day including Timothy Leary, Dick Gregory and Al Capp, and is a very interesting and important historical record.
Yoko has put it online for free viewing this weekend. Hurry and catch it. It won't be there for long.