Help With a Song: Smokestack Lightning

[Loaf]

I just watched the Gil Scott Heron documentary The Revolution Will Not Be Televised (dir: Don Letts), and there featured in it an amazing version of (i think) Smokestack Lightning. Two short clips of the song were played, and I am unable to find which version it is.

It sounds like it's Howlin Wolf singing, but it's not the famous Howlin Wolf version that everyone has on slsk (it's not John lee Hooker or Muddy Waters' versions either) Of course, the doc didnt feature music credits at the end, and i cant find credits for it online, so i was hoping someone on here has seen it and can point me in the right direction?

EDIT: i found it, it was 'Spoonful', not 'Smokestack Lightning.'