: This is a specific "release group" or site tag. In this context, it is an abbreviation for SkymoviesHD , the platform that uploaded or encoded this version of the file.
720p HDRip (indicates high-definition quality ripped from a digital stream) TBDSKMHD -2018- Www.SkymoviesHD.Wine 720p HDRip...
The string typically serves as a file metadata title used to organize content on file-sharing servers. : This is a specific "release group" or site tag