YouTube-sday: What is the blues?

Over the weekend, I caught part of a special shown on Ovation TV about Howlin' Wolf. Oh my goodness - amazing fails to convey just how great the movie was. They need to play it about 100 more times. During it, HW plays the following song, after having a little tense words with a very drunk Son House. One thing - in the movie, I could have sworn they showed this song from another camera angle which highlights HW's incredible slide guitar skills. Just get the movie and enjoy.