: This is the Matroska Video file format, a common container used for high-quality video that supports multiple audio tracks and subtitles.
: These are likely the names of the "release groups" or the websites that originally uploaded or encoded the file. world4ufree-wiki-tkks-s04-e12-720p-mkv
: This is an abbreviation for the title of the show. In this context, it most likely refers to the Indian television series The Kapil Sharma Show . : This is the Matroska Video file format,
: This identifies the specific part of the series: Season 4, Episode 12 . Episode 12 .