16:9
Based on the file name, it appears that this video file may be from a TV show called "Witness no-3", possibly Season 1, Episode 4. The "[Gld]" in the file name may indicate that the file was obtained from a specific source or group. Witness no-3-S01E04-720p-HDTV-[Gld].mp4
MP4 (MPEG-4 Part 14)