On a , right-click the file and select Properties > Details . This can reveal the "Date Taken," the "Originating Tool," or the "Contributing Artists," which often provides context on where the video came from. 2. Verify File Safety
💡 The .mp4 extension stands for MPEG-4 Part 14 . It is a "container" format, meaning it holds video data, audio data, and even subtitles all in one package. MP4 files explained: How to open and use - Adobe g60408.mp4
Before opening any unknown MP4, it is wise to scan it for malware. You can use an online scanner like VirusTotal to ensure the file hasn't been bundled with malicious scripts. 3. Use a Universal Player On a , right-click the file and select Properties > Details