I thought I'd begin with a snippet of media that came to be "memetic" long before the Internet came round to bestow its own faddish definition of #meme as an image or short video clip, usually festooned with block-capital flavor text, passed round through email and social-media posts.
I give you Robert Preston in Meredith Willson's *The Music Man*, singing about trouble (right here in River City):
https://youtu.be/2Hk1KSxzfcg
I first learned about this clip through AM radio: growing up in San Diego I was keen to pick up on radio stations which liked to broadcast snippets of comedy or novelty songs—often as part of a morning-show format, something intended to perk people up in their early hours.