So many I have loved on here, and so many suggestions. So many people mention There's Something Wrong With Aunt Diane- that's one where the true situation was very different to what the people involved- in that case her husband- try to portray.
There should be more mentions of Shoah- a nine-hour documentary about the Holocaust, made in 1970 (I think). There is no archive footage of concentration camps, just talking heads (and one bit of secret recording, and one "doorstepping" of a former guard who by 1970 was working in a bar). Just the words are enough. So so shocking.
The Up series is incredible- following participants from age seven to currently 63. The director, Michael Apted, has now died, and was I think suffering from dementia when he made 63 Up. From what I've read, the participants are up for doing 70 Up if the rest of the team that make it stay on. Then I think it should bow out- 84 Up wouldn't be a good idea I feel.
Two that haven't been mentioned- on Iplayer there is a series of documentaries from the 60s/70s called Man Alive, and there is one called Gale is Dead which I think about all the time. www.bbc.co.uk/iplayer/episode/p055sys5
It's about a girl who grew up in care in the 50s and 60s, who died of a heroin overdose in early 1970, aged 19. The only consistent person in her life was a lady from one of the children's homes she'd been in, but then Gale was sent away, though when she ran away she always went to this lady's house. By 19 she saw no point in her life and it was only a matter of time before she overdosed. Part of my fascination is how different the ethics of documentary-making were then (Gale had featured on an earlier documentary, and a farming couple in Devon contacted the BBC and invited Gale to spend holidays with them and their young kids!). It is so bleak. I Googled the main children's home she was in, Beechholme in Surrey, and there was a lot of sexual abuse there. It's not mentioned in the film- it rarely was in 1970- but I can't help wondering if that happened to her. She was so bright and had so much potential, but she felt she had nothing to live for.
A recent one which is full of such joy- tinged with sadness- is Get Back on Disney+, about the Beatles recording the Let It Be album. They go from an uncomfortable week in Twickenham studios, where they bicker, John is off his head on heroin and George walks out of the band, to the joyful concert on the roof of the Apple building in Savile Row. The smiles between them as they play live again are a joy to see, although as a viewer you know that it would all fall apart later the same year.