Right-click the file, go to Properties , and check the Details tab to see the "Date Created" or "Origin." On Mac: Select the file and press Command + I .
The filename follows a standard convention used by major platforms to manage millions of assets: nIdBMpOq_720p.mp4
If the file won't open in your standard player, tools like the VLC Media Player are designed to handle almost any MP4 regardless of the internal codec (like H.264 or HEVC). Right-click the file, go to Properties , and
The file nIdBMpOq_720p.mp4 is likely just one "slice" of a larger media project, specifically optimized for mid-range performance. 3. How to Identify Mysterious Files Right-click the file