Here's a link to a video clip of the Malian guitarist/vocalist Ali Farka Toure:

http://www.youtube.com/watch?v=y5Nem-PNHLY

In this clip, Ali Farka Toure's talks about the African roots of Blues. His comments are translated into English and shown on the video. Corey Harris is the African American man who is learning from and singing with this great Malian musician/vocalist. A summary of this same clip with Toure's words translated into another language [?] indicated that this video is from the Martin Scorsese film "The Blues Feel Like Going Home".