Argh...
Fine, I'll say the lyrics, maybe you can recognize it...
I don't know the lyrics exactly, but this is what it sounds like:
"Doh- set to me- you know - it's gonna be alright. Tonight! Doh- set to me-.... etc.."
The song is quite lively and fast.
The tune in the beginning goes something like:
C (low) (long)
DEGAC (going up)
ACAGA
I have one person, who has listened to it, and told me that it's "not the Beatles", but that seems unlikely, since the documentary showed the Beatles singing it! Unless it's a rare song?
Oh, and it's not Revolution, because I've got that song, and it sounds completely different.