As we all love music, this is a must-see.
It's about the group (not a band as they promote it) of studio musicians that played on so many iconic studio albums from the Monkees to Jefferson Airplane to Neil Diamond and the Beach Boys. It's almost all personal interviews with the musicians themselves.
It was done via Kickstarter by one of the musician's sons so it's has its weaknesses but there's a lot of good inside information and some good stories.
I assume you can see it on Netflix but the DVD has tons of additional material.