I'd never heard this Sammy Davis Jr. cover of José Feliciano's charming Chico and the Man theme!
Chico and the Man told the story of Ed, an alcoholic garage owner in 1970s East L.A., and Chico, a struggling young man looking for work. The two form an incredible relationship, and the chemistry between actors Jack Albertson, who plays Ed, and Freddie Prinze's Chico was amazing.
The show has a sad history, during its run Freddie Prinze lost a battle with depression, and drugs, wherein he took his own life. The theme song, however, is seriously uplifting. It encourages tolerance and understanding.
If you want to try the show, this DVD via Amazon has 6 handpicked episodes for $4, including "Ed Talks to God" the final episode with Prinze. I didn't have any luck finding full episodes on YouTube.