: The "Matroska" container format, commonly used for high-definition video files because it can hold multiple audio and subtitle tracks. Risks and Quality
: This typically stands for a Pre-DVD Rip . It is often a lower-quality version released before the official retail DVD/Blu-ray is available. It is frequently a "high-quality" theater recording (CAM) that has been edited to look better, but it is not a true studio-quality release. : The "Matroska" container format, commonly used for
Why are almost all movies / TV from a release group? : r/trackers : The "Matroska" container format