The file extension (Matroska Video). It is a popular "container" format because it can hold multiple audio tracks (like the dual-audio mentioned) and subtitle files within a single file. Where to Watch Legally
The long string of text in your query is a standardized format used by online file-sharing communities to describe the media's quality and features: The file extension (Matroska Video)
Identifies the series title, the year it premiered, the season (01), and the episode number (07). the year it premiered