At its most basic level, is a video file that circulated primarily on Russian file-sharing networks like DC++ (Direct Connect), local LAN parties, and early torrent trackers such as RuTracker.org. The name refers to "Bibigon," a small, fictional character created by Korney Chukovsky—a Soviet-era children’s writer. Bibigon is essentially a tiny, thumb-sized boy who lives on a dacha and claims to have fallen from the moon. In the official Soviet cartoons, Bibigon is cute, adventurous, and harmless.

Imagine a child's worst nightmare spliced together by a confused editor:

They followed clues that led nowhere and then somewhere terrible: to a field of telephone poles where the air hummed and made every metal thing sing; to a pier where the water looked black as dried ink; to an abandoned observatory where someone had painted runes on glass. Each place that promised a door seemed to demand a price—a lost shoe, a night of rain, a story confessed to strangers. Finn paid, and he asked Bibigon to pay, too. Bibigon’s eyes would flash then, like catching light through a bottle. He didn’t understand cost the way people did; he knew only that he owed something back.