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.
When downloading videos from platforms like WhatsApp, Telegram, or Discord, the original filename is often stripped and replaced with a random or sequential numeric string. Technical Profile (Standard .MP4) 10500503.mp4
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? If the file was downloaded from an unknown
Right-click the file and select Properties (Windows) or Get Info (Mac) to see the "Media Created" date, which often reveals the true origin. which often reveals the true origin.