This is the gospel blues! Sister Rosetta Tharpe was a great guitar player and singer, shown here in great form. Check her out playing her Gibson SG with the side-moving vibrato arm. I could only hope to play with such conviction.
This performance is just about as deep as they come, mixing the blues with gospel music in a very unique and thoroughly expressive style – every time I hear it I get the chills. In fact, this song was chosen by Carl Sagan to be included among the 27 songs and other sound recordings sent on the Voyager spacecraft in 1977 (on an LP made out of gold, apparently).
One tiny frustration with this video is that the featured photo that appears at c.1:30 (see above) is a well known photo of Blind Willie McTell, not Johnson.