Unlike clips taken from a film or viral video, this is a straightforward infant sound effect, the kind recorded for stock libraries and shared widely on soundboards for everyday editing. Baby coos have long been a shorthand for innocence and tenderness in videos, so the sound works even without any recognisable character or scene behind it. Online it is commonly paired with cute animals, newborn announcements and wholesome reaction moments, and its short length makes it easy to drop into memes, shorts and slideshows without overpowering dialogue or music.