The filename itself is likely a random string or a specific internal code used by the creator to add to the "industrial" feel of the mystery. The Verdict
Sites like Reddit and 4chan have taken the file and built an entire backstory around it, turning a simple video into a sprawling digital myth. Is it Real? g051.mp4
In short: Almost all "cursed" or "mysterious" files of this nature are the work of talented digital artists, sound designers, and horror enthusiasts. They are designed to be "ARGs"—interactive stories where the audience plays detective. The filename itself is likely a random string