Likely a rip from Crunchyroll or a similar streaming/distribution site. Series Overview Genre: Action, Adventure, Fantasy, Military.
A sequel series titled GATE Season 2: Jieitai Kano Umi nite, Kaku Tatakaeri (English: Tides of Conflict ) has been announced, which focuses on the Japanese Maritime Self-Defense Force (Navy). The "n-ship" in your filename may be a reference to this naval focus. Technical Specifications Resolution: 1080p Full HD (1920x1080). Format: .MP4 (Standard video container). gateanime-com-n-ship-004-1080fhd-mp4
In the early episodes, the story follows Lieutenant Youji Itami and the JSDF as they establish a presence in the "Special Region". Episode 4 typically centers on the aftermath of the first major dragon encounter and the JSDF's growing influence on the local politics and refugees. Likely a rip from Crunchyroll or a similar
The filename appears to refer to a high-definition (1080p) video file from the anime series Gate: Jieitai Kano Chi nite, Kaku Tatakaeri (GATE) . The "n-ship" in your filename may be a