This seems to be the entire Concert for Bangladesh. Ringo Star, George Harrison, Bob Dylan, Clapton, Leon Russell, Billy Preston, and many more. Introductions and then "While my Guitar Gently Weeps" starts about 48 minutes in. One of my all time favorites starts about 55 minutes in, Leon Russell doing "Jumping Jack Flash". He was turning grey in 71 when this was recorded and he's still rockin'. Amazing.
Dylan comes on about an hour and ten minutes in.
I don't think we'll see the equal of this again.