: The video codec used (H.264) and the name of the release group (UBi).
If you are looking for a "piece" of information regarding the file name you shared: : Refers to Season 1, Episode 18. NCIS.Hawaii.1x18.TNT.ITA.DLMux.x264-UBi.mkv.mp4
: Short for "Download Mux," meaning the audio and video were taken from different sources and combined. : The video codec used (H