It belongs to a genre of "bait-and-switch" files commonly shared in trolling circles. Like its predecessors (such as the famous "Car Commercial" or "Maze Game"), it relies on the curiosity of the user to click an unlabeled or cryptically named file.
The video typically starts with a very quiet, dark, or seemingly "glitched" scene that encourages the viewer to turn up their volume or lean closer to the screen. After a few seconds of tension, it cuts to a high-volume jump scare—often featuring a distorted face or a piercing shriek. g408.mp4
If you see a file with a generic alphanumeric name (like g408, vid_992, or crash.mp4) being shared without context, it’s best to keep your volume low or check the comments/reactions before playing. It belongs to a genre of "bait-and-switch" files