G61020.mp4

(e.g., a car accident, a tutorial, a nature clip, a product demo)

Some automated backup services or forum attachments assign short alphanumeric codes to files upon upload. g61020.mp4

(e.g., a specific subreddit, a company internal drive, a cloud backup) a car accident

Many Chinese-manufactured dashcams and security systems use the g[date][time] or g[sequence] naming convention. a nature clip

If you can describe what happens in the video, I can write a professional summary, a set of "next steps," or a breakdown of the technical content.