What a nice picture I've found :D
Original：第三次渾作戦
「艦隊これくしょん～艦これ～」
Vocals：小峠 舞
Lyrics：天音未優
Arrangement：K2
Circle：C-CLAYS | http://cclays.blog.fc2.com/blog-entry-300.html
Album：焔ノ旗 ～ホムラノハタ～ | Comiket 87
Illustration：シモシ | http://www.pixiv.net/member_illust.php?mode=medium&illust_id=41983078
I don't own anything in the video, including the audio and picture. The credits go to the respective owners. This video is purely fan-made and will not be used for profit or illegal sharing!