Users misremembering other actual "shock" videos or early YouTube performance art (such as the works of Nana825763).
The "Natalie500.mp4" file is typically described as a low-resolution, grainy video that purportedly circulated on peer-to-peer file-sharing networks (like LimeWire or Kazaa) or early video forums in the mid-2000s. According to the legend:
Today, Natalie500.mp4 remains a popular topic for "iceberg" videos and deep-dive Reddit threads, proving that on the internet, a good story is often more enduring than the truth.