A friend let me borrow this documentary last night:
Documentary
It's from 1977 and was pretty legit. Not a whole lot of new info on there for avid reggae fans, but there are some awesome interviews with Joe Higgs and Jimmy Cliff as well as some sick footage of live recording sessions from The Heptones, The Gladiators, Third World and Jacob Miller and Inner Circle. it's a quick 45 minute watch. Definitely worth it if you haven't seen it before
