Numbered sequences used by editors for B-roll.
If you can tell me or provide additional context (such as the website name or a description of the thumbnail), I can help you identify if it is a legitimate media file, a specific art project, or something you should avoid for security reasons. Girls Forever (1194) mp4
If you have encountered this file and want to know what it is without opening it, you can: Numbered sequences used by editors for B-roll