Crowd laughter has long been used in television and radio to signal that a joke has landed, and the same idea now travels widely in short online videos. Creators use this brief clip as a quick stand-in for a live audience, dropping it into memes, reaction videos, gaming clips and edits where a real crowd would be impractical to record. Because the sound is instantly recognisable and needs no explanation, it continues to work across platforms, helping a punchline land, softening an awkward pause and making a solo viewer feel part of a shared joke.