You might enjoy Wreckers Of Civilization, which is a total chronical of TG, but something free which you could watch is BBC's Other, Like Me: The Oral History Of COUM Transmissions And Throbbing Gristle. It is early stuff, that doesn't get into TG as much as pre TG. Nice video though, but there is a lot more info out there. But they are one of my fav groups/artists. The song weeping is actually about the death of Ian Curtis.