: The file extension. Matroska Video (MKV) is a container format that supports multiple audio tracks, subtitles, and high-quality video in a single file. Context and Popularity
While these filenames look like specific technical labels, they are frequently used as bait. world4ufree1-pics-avengersendgame-1080pdual-mkv
: Often refers to promotional images or screenshots included in the file directory to show the video quality before a user downloads the full movie. : The file extension