The "18720px264worldmkv" part of your query indicates a digital copy of the film: : 720p (high definition). Codec : x264 (H.264/MPEG-4 AVC). Container : .mkv (Matroska Video). Source : Distributed or hosted by "worldmkv."
For those encountering this specific string in media databases, the nomenclature follows standard scene release tagging: monamour2005 18720px264worldmkv 2021