R.L. Burnside was a blues musician from Mississippi who gained some fame in the early nineties touring with Jon Spencer of Blues Explosion fame and unfortunately has nothing to do with the character of the same name from The Bill (remember DCI Burnside?). "Let My Baby Ride" is taken from the 1998 album "Come On In"
"Let My Baby Ride" was covered as part of the intermission of the film "Holy Motors" directed by Leos Carax (him again) where Denis Lavant (him again) leads a troupe of musicians slinging accordions and other instruments around what seems to be a church. While the clip may seem weird out of context it doesn't make more sense in the movie to be honest.