: This is likely a shorthand for "Binaura" (Arabic for "translated" or "subtitled") or a specific internal numbering system used by the site's uploaders.
: Specifies the file container format (MPEG-4 Part 14), which is the standard for web streaming due to its balance of quality and compression. Context: Gate Anime (بوابة الأنمي) gateanime-com-bn-260-720hd-mp4
: A portal opens in Tokyo's Ginza district, leading to a fantasy world. The series follows the Japan Self-Defense Forces (JSDF) as they explore this "Special Region". : This is likely a shorthand for "Binaura"
: Indicates the video resolution is 1280x720 pixels, commonly known as High Definition (HD). commonly known as High Definition (HD).