Satsuki Decoder Pack!

The Matroska Multimedia Container is an open standard free container format, a file format that can hold an unlimited number of video, audio, picture, or subtitle tracks in one file. It is intended to serve as a universal format for storing common multimedia content, like movies or TV shows.

The CCCP was created to replace the video playback packs provided in favor of a single reliable pack capable of decoding practically anything.