Users often disguise the clip as something else—like a serious news report, a sports highlight, or a helpful tutorial—to trick others into playing it at full volume in public or around family.
Creators often download variations of these sound effects from sites like Pixabay or Adobe Express to use in their own prank videos.
It’s often sent in Group Chats (WhatsApp, Discord) to catch unsuspecting friends off guard.
It looks like you're referring to the file, which is a notorious internet meme and prank sound clip. What is "moan.mp4"?