First, "vegamoviesnl" is probably a website or a file name from a torrent site. The "60fps" part indicates the movie was encoded at 60 frames per second, which is better than the typical 24fps for a smoother experience. The "f9" might refer to a specific encoder or tool used, like HandBrake's presets (though I'm not sure about the "f9" part). "2021" is the year, "dc" could stand for Digital Cinema or Direct Cinema, and "1080p" is the resolution. "Blurayx" might relate to a version of a Blu-ray rip.