If you found this in a cache folder, it is likely a temporary file from a video you viewed on a social media app.
If you have access to the video, you can describe the where you found it. I can then help you draft: A Summary of the action. Technical Metadata (length, frame rate, etc.). Contextual Analysis (who is in it or what it’s teaching).
The suffix _720p indicates the video is in High Definition (1280x720 pixels), suggesting it is optimized for web streaming. How to get a write-up: