Based on standard scene release naming conventions, the components of the filename mean:

: Likely the beginning of a language or group tag (e.g., "Atmos" for audio or "AMZN" if it were Amazon-related, though "APTV" is already specified). Cultural and Narrative Context

: The film is set in 1650s Kilkenny during the Cromwellian conquest of Ireland.

: The video resolution (1920 x 1080 pixels), providing Full HD quality.