: The "signature" of the individual or group who processed and uploaded the file.
The title you mentioned, , refers to a specific digital file of the second episode of the TV series Castle . Castle_1x02_Tradimenti_DVDMux_ITA_by_moll
: The Italian title for this episode ("Betrayals"). : The "signature" of the individual or group
: This indicates the video was taken from a DVD source and "muxed" (combined) with an Italian audio track. ITA : Confirms the language is Italian. Episode 2 (titled "Nanny McDead").
The name follows a common format used in file-sharing communities: : Season 1, Episode 2 (titled "Nanny McDead").