It's possible this is a specific file name from a private collection, a dashboard camera clip, or a very niche technical demo. If you're referring to a particular "solid feature" within a video (like a standout scene or a technical specification), could you provide a bit more context?
about the encoding or "solid" rendering of that MP4? b5_130.mp4
Please share any you have so I can help you track it down! It's possible this is a specific file name
of where that file originated (e.g., a specific creator or website)? a dashboard camera clip