: The compression standard used for the video. It is the most widely supported codec for HD video.

Film file names use specific "scene" tags to tell you exactly what you are getting: : The title and release year of the film.

: Standing for Dolby Digital Plus 5.1 surround sound. This provides high-quality audio with six channels (center, front left/right, surround left/right, and a subwoofer).

: Likely the name of the release group or source that prepared the file.