The video file "Crimson.Girls-.Chikan.Shihai.01.-1280x720.x264.AAC" suggests that this is a high-quality video encoding of the episode, with the following specifications:
The video file, with the specifications 1280x720.x264.AAC, suggests that the episode is encoded in H.264, a widely used video compression format, and has a resolution of 1280x720 pixels, which is a standard HD resolution. The AAC (Advanced Audio Coding) audio codec is also used, which provides high-quality audio. Crimson.Girls-.Chikan.Shihai.01.-1280x720.x264.AAC
The filename you provided refers to a specific Japanese adult animated (hentai) OVA. The video file "Crimson
