: Likely a tag for the specific encoding group or a shorthand for the release team.
: This often indicates a "Part 1" or a specific "Phase" of a multi-part release or a revision tag from the encoder. world4ufree-cfd-tekhi-chutny-p01-hevc720p-mkv
In short, this is a released by the World4uFree group. : Likely a tag for the specific encoding