Often starts with a legitimate-looking tutorial screen (e.g., a Windows desktop or a Minecraft launcher) before abruptly cutting to a loud, distorted meme, a "troll" face, or a confusingly edited sequence.

If you are actually looking for how to create or manage such a video file:

You can convert various video formats to MP4 using tools like VLC Media Player or Handbrake .

It is frequently used as a reaction file to mock someone asking a basic question or to "trap" people into watching a nonsensical video. Technical Context of MP4 Files