: The vertical resolution of the video (1920 x 1080 pixels), which is standard Full High Definition.
That string is a standard file naming convention used by digital media release groups to identify a specific version of a movie.
: This is likely the beginning of the "release group" tag (e.g., AMIABLE, ARCHiViST), which identifies the community or individual responsible for creating and uploading that specific digital copy.
: The movie title and its original theatrical release year.