: The specific episode (Season 2, Episode 7, titled "Pecheneg Winter").

: Indicates the file contains multiple audio tracks (often several different languages). 1080p : The video resolution (Full High Definition). NF : The source of the content (Netflix).

Based on the file naming convention, here is the reconstructed full title and the breakdown of what each part of that text represents:

: The format type, meaning it was downloaded directly from a streaming service without being re-encoded from a screen capture.

: The name of the series ( Vikings: Valhalla ).

: The video codec used to compress the file (Advanced Video Coding).