Sounds like this come from everyday youth baseball culture, where parents film from behind the fence and cheer louder than anyone else in the park. The baseball mom whoop became a shareable reaction because it is instantly recognizable even without video. On soundboards and in edits it is used less as a realistic crowd effect and more as a character, shorthand for the overinvested, supportive parent who treats every at bat like the World Series. Its brevity keeps it popular for memes, group chats, and quick sports punchlines.