This clip comes from Balloon Boy, a character from Five Nights at Freddy's 2, the 2014 survival horror game by Scott Cawthon. His cheerful voice line became memorable because it contrasts with the stressful gameplay and his role as an irritating threat. Over time, fans clipped the hello and reused it in FNAF compilations, reaction edits, and short meme videos. It still gets used because one word is enough to signal Balloon Boy instantly to players who know the series.