If you are looking for technical information regarding the format itself:
In professional video editing or development (such as game design), "g4" could refer to a specific project phase (Gate 4 or Gen 4) or a particular asset category. General Information on MP4 Files g4_0156.mp4
MP4 (MPEG-4 Part 14) is a digital multimedia container format most commonly used to store video and audio, but it can also store other data such as subtitles and still images. If you are looking for technical information regarding
Can you clarify or if it is part of a specific software error or dataset ? g4_0156.mp4