: The audio format and channel configuration. AAC is a high-quality audio codec, and "5.1" means it supports surround sound (5 normal speakers and 1 subwoofer).
: Indicates that this file contains Season 1, Episode 7 of the show. : The audio format and channel configuration
: The file extension. Matroska Video (.mkv) is a flexible container format that can hold unlimited video, audio, picture, or subtitle tracks in one file. : The audio format and channel configuration
: The title of the popular Indian crime thriller streaming television series. : The audio format and channel configuration
: Short for "English Subtitles," meaning the video file has English subtitles included (either embedded or as a separate selectable track).