: Indicates "Dual Audio," meaning the file contains two audio tracks (typically Hindi and English).
"World4ufree-cfd-penlisnd-1080p-dual-mkv" is not a specific film or product, but rather a file naming convention used by like World4uFree . world4ufree-cfd-penlisnd-1080p-dual-mkv
: The term "penlisnd" appears to be a specific (and likely misspelled) tag or internal code used by the uploader to track the release. : Indicates "Dual Audio," meaning the file contains
The string describes the technical properties of a video file: : Indicates "Dual Audio
: The Matroska Multimedia Container format used to wrap the video, audio, and subtitle tracks. Important Considerations