These are in .ogm format, play them with VLC Player or your favorite player.
New Dominion Tank Police 1-6[Anime-Takeover]
Video - XviD MPEG-4? 640x480 @ 23.97 FPS
Audio - Ogg Vorbis 44100 Hz, Dual Audio (Japanese, English)
Subtitles - English
Taken from anidb.info:
Leona, her tank and the Puma sisters are back for a new series of adventures
in Kobe, Japan in the year 2100 A.D. With terrorism a constant threat in the
ruins of Newport City, Leona and the Puma sisters lead the newly formed tank
police as they try to regain control of the increasingly lawless city.