This is a "release group" tag. In the world of digital archival, groups like 4HRG were known for optimizing file sizes for faster sharing while maintaining visual clarity. The Legacy of the Film
This indicates the video was encoded directly from a retail DVD, ensuring a clean, standard-definition image (usually 720x480 or 720x576) that is superior to VHS rips. Boxing Helena -1993- DVDRip AAC-4HRG.torrent
This stands for Advanced Audio Coding, a standard for lossy digital audio compression that provides better sound quality than MP3 at similar bit rates. This is a "release group" tag