The exact origin of this upload is unclear, but the clip circulates online under the Dutch name Hema fluit and is commonly searched alongside terms like hema fluitje and scheidsrechtersfluitje. Its spread seems to come from practical sharing on soundboards and short-form edits rather than from a clearly documented film or TV source. It stays useful because a whistle sound is easy to understand across contexts: it can signal stop, foul, mistake, or instant disapproval without needing any spoken explanation.