: Sites that aggregate public-domain or creative commons videos often retain the original camera filenames. Technical Profile of an MP4 File
: Most commonly H.264 (AVC) or H.265 (HEVC) , which allows for high quality at a relatively small file size. Ajb06719 mp4
Because "Ajb06719.mp4" is a specific file name rather than a widely known title (like a movie or song), the content of the video depends entirely on the source. Common Sources for This Filename Format : Sites that aggregate public-domain or creative commons
: Many cameras (like Garmin or various "no-name" brands) generate sequential file names. "AJB" followed by a string of numbers is a common default naming convention for recorded loops. Common Sources for This Filename Format : Many
: If you have the file, right-click and select "Properties" (Windows) or "Get Info" (Mac) to see the creation date and camera model.