: Likely the specific encoding group (short for "Compressed For Direct") responsible for compressing the video.
: The resolution of the video (1280 x 720 pixels), which is Standard High Definition. world4ufree-cfd-bb-s16-e26-hevc720p-mkv
The string is a specific file naming convention typically used on file-sharing and torrent websites. : Likely the specific encoding group (short for