On cable recently, I came across a canadian film from 2005 called "Djangomania". Pretty enlightening look at the guitar legend's current influence.
Sundance channel
Telefilm, Canada
Also, several months ago I watched two consecutive cable documentaries on PBS one evening. The first one was called "Heart Of The Sea", about an extraordinary Hawaiian woman who influenced thousands of people with her energy and lust for life (especially surfing) while battling breast cancer. The story itself is fairly remarkable, but it was the unbelievably stunning quality of the filmmaking that really knocked me out. If you come across it, don't miss it.
As soon as I finished watching "Heart Of The Sea", I watched a documentary called "One Cool Cat" about the life of Sammy Davis Jr. It was truly awful. I read this at Amazon, and I agree 100%:
This is a listless, plodding, dispassionately-narrated biography of the man who is very likely the greatest all-around entertainer ever. The on-camera commentary is provided not by people who knew Sammy personally, but by a couple of historians and a tap dancer who speak about his artistic achievements and significance from a dry, rather remote perspective. The A&E biography has all the information this one does, and more, and packages it in a much more compelling and comprehensive documentary. This was a great disappointment.
Talk about a stark contrast in the skill and art of making a documentary film.