: Select the file in Finder and press Command + I (Get Info) to view the "More Info" section.
: Many systems name files by the time of day (e.g., 15:45 or 3:45 PM). 1545mp4
: Ensure it isn't a different file type renamed to .mp4. You can verify the true file signature using an Online Codec Checker . 3. Possible Origins : Select the file in Finder and press
: If the file was interrupted during recording, tools like Handbrake can sometimes "re-encode" and fix minor structural errors. you can check its metadata:
If the file won't play or you need to know its origin, you can check its metadata: