The Rutles "All You Need Is Cash" is a spoof on The Beatles and is classic comedy that still holds up today. You can buy the DVD, but thankfully, it is also on YouTube (for free -- you don't need cash).
Here is the full hilarious version with familiar faces from Monty Python and the Not Ready for Prime Time Players (the original Saturday Night Live cast).
English writer, comedian, and musician Neil Innes died earlier this week (December 29). He collaborated with Monty Python from their early days as a sketch writer and musician (he was often referred to as "The Seventh Python." He also took part in the film, "The Rutles," a film spoof of The Beatles.
Here he is on the British comedy, Rutland Weekend Television, with George Harrison as a guest.
And here is Neil Innes in a classic spoof of the folk music scene ("I've suffered for my music, now it's your turn"):