TockTockTock

I'm having trouble remembering this guy's name. I was going to explore his music, but I can't remember his name now. He's a country musician, I know that much. I also remember a color film with him playing in someone's house. If I remember correctly, he's with an elderly black man (who gets a bit teary in the song) and a young white women. I do know a bit about him, I know he was a bit of a mystery to people and that he traveled a lot with his guitar (trains, etc). I also know this was either during the sixties or seventies. I know his story sounds a bit hokey, but I only know this much. If anyone can help, that would be wonderful. I've been trying to get into country, and I think he's the only way (aside from Johnny Cash). Oh, and someone posted that video somewhere on this thread...