This is the original 1975 documentary, not the 2009 HBO telemovie – but boy, is this original study of Jacqueline Bouvier Kennedy’s odder relatives fascinating, no matter how many times you’ve seen it. And since Jackie Kennedy’ taped interviews were released last year, affording us lengthy tastes of her voice and accent, it’s even more amazing how much the former First Lady sounds like this documentary’s “Little Edie.” Yikes.