Because this is a default system name rather than a specific title, the content of the file depends entirely on its source. However, filenames like this are most commonly associated with:
MPEG-4 (usually using the H.264 codec), which is compatible with almost all modern phones, TVs, and computers.
Some apps save temporary video previews using this naming convention. How to identify the content:
Many free stock video sites (like Pexels or Pixabay) export files with generic resolution-based names like vid_720p .
Check the to remember what you were browsing or downloading at that specific time. Common Technical Specs for "720p" MP4s: Resolution: Aspect Ratio: 16:9 (Widescreen).