Right-click the file (Windows) > Properties > Details to see if there is any location data or "encoded by" information that reveals the original app.
07:12:01 AM (likely in the local time of the device or UTC, depending on the app) video_2022-08-29_07-12-01_mp4
If you tell me the subject matter (e.g., a specific tutorial, a game clip, or a news event), I can provide a much more detailed guide on that specific topic. Right-click the file (Windows) > Properties > Details
If you found this file on your device and aren't sure where it came from, check these common sources: Identifying the Source This is the most common
.mp4 (a universal video format compatible with almost all devices) 2. Identifying the Source
This is the most common platform that uses this exact video_YYYY-MM-DD_HH-MM-SS format. Check your Telegram "Saved Messages" or chat media from late August 2022.