If this is from a personal device or cloud backup (like Google Photos or iCloud), the name might have been assigned during a sync process. To identify the content, you can try:

with a versatile media player like VLC Media Player .

a screenshot from the video to see if it matches a known viral clip or news segment.

If this appeared in a cache or a website source code, it may be a "source" file meant for a specific player.

or metadata to see if a "Title" or "Author" is embedded.