There are a lot of documentaries freely available on YouTube.
Sometimes the producers release them for free, but most often other people upload the films and the copyright owners don't bother with taking them down.
xDocumentaries is a central place where you can easily find these documentaries...
Music, 2008, with Jimmy Page, The Edge, Jack White, 1 hr 38 mins
A 2008 documentary directed by Davis Guggenheim which looks into the careers and playing styles of the three famous guitarists Jimmy Page, The Edge, and Jack White.
As the three meet up in a 2008 summit of talking and jamming together, the film presents flashes from their lives intertwined,...(show more)