"The three Yorkshiremen" monty python sketch. It's actually a sketch that some of the pythons did for another comedy sketch show some years before. As far as I know it's the only one they carried forward.
My parents could recite a 1940s radio comedy sketch about the phonetic alphabet and cockney rhyming slang which would probably make no sense to most people today, they'd carried it with them into the 70s and 80s.
An awful lot of contemporary humour simply fades away and maybe one or two key moment carries on.
Future generations may know Chaplin solely from a clip of modern times in the machine. Or know Lucille Ball treading grapes.
"But, tell that to the youth of today, they won't believe you"