Is "18709" a (like September 18th, 2009) or just a random number ?
Why does this file matter? Is it a lost family video? A piece of evidence? A leaked clip? 18709mp4
Explain what an MP4 is (a container for audio and video) and what the numbers might represent (a timestamp, a database ID, or a sequence). Is "18709" a (like September 18th, 2009) or