If the filename is part of a URL (e.g., ://site.com ), avoid clicking it unless you trust the source.

Some privacy software renames files to hashes to hide the original content from prying eyes.

If you must watch it, use a virtual machine or a web-based player like Google Drive preview rather than downloading it directly to your hardware.

If you have the file, right-click and check Properties (Windows) or Get Info (Mac) to see the "Origin" or "Encoded date."

Knowing if it was in a specific forum , a received message , or a game would help me dig deeper into what the video actually contains.

Discord often renames uploaded files to long alphanumeric strings.