Right-click the file and select Properties (Windows) or Get Info (Mac) to see the "Media Created" date, which often reveals the true origin.
Could you provide on where you found this file or what you expect to see in the video so I can help you identify it further? 10500503.mp4
If the file was downloaded from an unknown source, run it through a service like VirusTotal before opening it to ensure it isn't a malicious script disguised as a video. Right-click the file and select Properties (Windows) or