: Refers to the video resolution (Standard Definition). It means the video has 480 horizontal lines of vertical resolution.
: Identifies the source or the website where the file originated.
: Denotes that the original high-definition source for this digital copy was a Blu-ray disc .
The string "THRGNKMHD (2017) wwwSkymoviesHDplus IMAX 480p BluRay ORG Dual x264 ESubmkv" is a specific file naming format commonly used by third-party media distributors or file-sharing sites to describe a digital movie file.
A young woman becomes worried about her boyfriend when he explores a dark subculture surrounding a mysterious videotape said to kill the watcher seven days after viewing it.