An "MKV" for the 1987 film refers to a file, a highly versatile "container" format used to store high-quality digital copies of the movie.
When downloading or acquiring this MKV, look for these technical specs in the filename: Predator.1987.2160p.UHD.BluRay.REMUX.HDR.HEVC.DTS-HD.MA.5.1.mkv predator 1987 mkv
If you are looking for specific technical data to verify or create a high-quality MKV rip of Predator , these are the standard 4K/UHD specs often found in such files: Matroska Video An "MKV" for the 1987 film