Okay, you get a lo-fi indie musician or band. You stick ’em in the back of a black London cab. You take a camcorder. You watch ’em play. Check out The Black Cab Sessions.
I recommend you watch Seasick Steve, who was the highlight of a Jools Holland Hootenanny a few years back. Also, do find the Raveonettes video, because I believe the girl may well become my future wife if I can track her down. (Reminds me of a girl I once knew… Good days!)