: This identifies the source or the website from which the file originated. World4uFree is a well-known, long-running pirate site that focuses on Bollywood and Hollywood movies.
: The video resolution, indicating High Definition (1,920 x 1,080 pixels). world4ufree1-pics-avengersendgame-1080pdual-mkv
: 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 : This identifies the source or the website