I'm going to give you the URL because there's more there than in the actual documentary.
The freedom riders are young whites and blacks from the north who went to the south to integrate the Jim Crow laws without violence. Unfortunately, lots of our white ancestors loved the violence and a lot of the freedom riders were hurt. They took buses and several times, the drivers ran. Then when the first batches of freedom riders were sent to jail, another batch came to take up the movement and get put in jail, etc., ending up with 322 in the jail.
You think about the southern governers and their ideas, but it surprised me that Bobby Kennedy clearly didn't really care what happened and held back in helping them. Eventually, a high-level assistant to JFK came down and got them to DC on planes and buses.
The end of the documentary gives you a grid of the freedom riders and as one fades out, another comes in, it gets faster and then it all fades. I thought that was an excellent design.
The documentary has video and photos, but most of it has people talking about what happened. John Lewis, who is in the House, is only labeled as "Freedom Rider."
There's an excellent article here -- don't mind the socialism. In addition, an article on the freedom riders' 50th anniversary yesterday and visiting the prison.