The original speaker, recording, and upload date are not reliably documented from the available information. Online, the phrase functions as a direct reaction to an unfamiliar or unexpected person, making it useful in short edits, gaming clips, group videos, and visual punchlines. Its popularity comes from how quickly the question establishes confusion without needing extra context. Variations such as “who tf is this guy” and “who tf is this” also circulate as captions and search terms for the same style of reaction.