The phrase appears to be a specific filename or a "scene" tag typically associated with pirated media or adult content distributed via file-sharing networks, forums, or torrent sites. Based on the structure of the string:
: Wrapped in a Matroska (.mkv) file to support multiple audio tracks and high-quality subtitle streams. monamour2005 18720px264worldmkv exclusive
Scene releases often use dots instead of spaces (e.g., Monamour.2005.720p.x264 ) because older server systems (FTP) couldn't handle spaces in file names. monamour2005 18720px264worldmkv exclusive
: The H.264/MPEG-4 AVC standard (represented by the x264 library) changed the internet by making high-definition video streaming possible even on slower connections. 2. Monamour (2005) & Tinto Brass monamour2005 18720px264worldmkv exclusive