It's a parody of an 70s-80s sitcom intro such as full house or Brady bunch. It goes on for longer than you think, continually playing the theme song as more characters are introduced and slowly the whole thing devolves into surrealism.

This is it. Reddit will keep pulling dumb shit that drives users away and hurts engagement for short term profits. Having viable and stable alternatives gives people a place to go so they don't feel trapped.