Funk Brothers Film

Entitled 'Standing in the Shadows of Motown', the surviving Funk Brothers now have their own film. According to the BBC, no one has ever heard of them. Many people recognise Marvin Gaye, but not his favourite guitarist, James Jamerson. I scoffed at this until I realised that I only knew the names of three Funk Brothers, all of whom are now in the great snakepit in the sky. Also they are very striking names, so I might be cheating anyway. According to the Guardian, the guy who played electric piano on 'I Heard It On the Grapevine' died the other day, which I thought was sad news. So a film seems like a good idea to me. Has anybody seen it? What do you think? Good idea? That kind of thing...