I would quickly, quickly go to the website at Sound City Website where you can purchase to stream. I bought it on dvd because I want to share this gem with whatever future generations may exist. Ideally I would like to lock it in a time capsule and bury it in front of City Hall under a cemented tile titled "This Is Good For You".
All of the musicians are amazing but what I will say as a highlight is that after watching this movie there can be absolutely no debate regarding how much of a "Bad Mama Jamma" that Paul Mccartney still is. The Beatles were that famous for a reason and you can still hear it in his playing and singing.
I now vow to one day record on that soundboard, by golly I will figure out a way to do it :).