On an iPhone, open the video in the Photos app and swipe up to see the date, time, and device info.

The .mp4 extension (MPEG-4 Part 14) is a highly compatible digital container that stores video, audio, and sometimes subtitles.

Right-click the file, select Properties , and go to the Details tab to see dimensions, frame rate, and duration.

This naming convention is common for files saved from Discord or recorded on Android devices, where the filename reflects the exact millisecond of creation or download. How to Access the Write-up Details

You can use tools like Metadata2Go to upload the file and extract its hidden data, such as camera settings or GPS location (if enabled during recording).