Because this is a default system name rather than a specific title, the content of the file depends entirely on its source. However, filenames like this are most commonly associated with:
Tools used to download videos from platforms like TikTok, Instagram, or Twitter often rename files to a standardized format. vid_720p (6)mp4
If you have this file on your device and are trying to figure out what it is without opening it, you can check the : Because this is a default system name rather
the file and select Properties (Windows) or Get Info (Mac). Look at the Origin or Source field if available. vid_720p (6)mp4