While this specific string doesn't represent a known public viral video or historical event,

Without more context on where you encountered this specific ID, it remains a for a piece of user-generated content.

The _source suffix typically indicates that this is the original, highest-quality version of the upload stored on a server, often found when inspecting a web page's source code or using a media downloader.

Do you remember you were using when you came across this file?

Digital asset management systems use these IDs to index millions of videos. If you found this in your browser cache or a download folder, it likely corresponds to a video you recently viewed on a social feed.