One Camera. One Take.
From comments at the YouTube site:
You only have to see Ford perform live to understand what is going on here. There is nothing pre recorded...he is genuinely doing it all as he goes along. When he plays live he loops the vocals and percussion through a separate 50's style microphone...here the single mic is taken in and out of the loop when he's singing. All the instruments are hooked up to the sampler. And he needs the ear piece to hear what he's playing properly. as I say, see him live, maybe it needs to be seen to be believed.