Without more context, it's just a generic ID. Knowing the platform or the topic of the discussion where you saw it would help identify the actual content of the video.
When videos are downloaded from platforms like Instagram, TikTok, or Discord, they are frequently renamed with random numeric strings. 8928097.mp4
That text appears to be a specific for a video file. In internet culture and technical contexts, filenames like this often point to: Without more context, it's just a generic ID