: Likely the name of the "release group" (a team that encodes and distributes digital media).
The filename follows standard scene release naming conventions used by groups like and platforms like Gintama 2 (2018) gintama22018bdripx264regretetmovies upd
The official Blu-ray remains the gold standard, often featuring "Making Of" documentaries that are just as funny as the movie itself. : Likely the name of the "release group"