Whether identified as "23301mp4" or another numeric string, the format is a digital multimedia container. It is the most common format for storing video and audio, but it can also hold other data like subtitles and still images.

If you have a file with this name and cannot open it, you can use specialized tools to view its internal metadata and determine what it actually contains: MediaInfo - MediaArea

In many digital environments, strings like "23301mp4" serve as unique identifiers rather than descriptive titles. They typically appear in the following contexts: