If this is for a creative project, you might frame the video as a "found footage" mystery or a personal digital time capsule: Fragment 10-12-21
If you have a file with this name and are having trouble with it, you can use standard tools to interact with it: 20211012mp4
MP4 Video is not playing in Firefox 35.0.1 - Mozilla Support If this is for a creative project, you
MP4 is a digital multimedia container format used to store video, audio, and other data like subtitles. and other data like subtitles.