The .mp4 extension is a universal container format compatible with almost all devices.
If this is a personal video (like a security camera clip or a screen recording), it's best to rename it to something recognizable: Select the file and press (Windows) or Enter (Mac).
Right-click the file, select Properties , and click the Details tab. You may find the "Date Created," which can help you remember when it was recorded. On Mac: Right-click and select Get Info . Ajb08406 mp4
A real MP4 should typically be several megabytes (MB) or gigabytes (GB). If the file is only a few kilobytes (KB), it is likely a broken link or a shortcut, not an actual video. 4. Renaming and Organizing
Before opening, run the file through an antivirus or upload it to VirusTotal to ensure it isn't malware disguised as a video. You may find the "Date Created," which can
Use a tool like MediaInfo to see the specific camera or software used to encode the video. 2. How to Open the File
If you found this file online or received it from an unknown source: If the file is only a few kilobytes
Since the name is non-descriptive, you can check the file's metadata to learn about its origin: