This indicates the source of the file. "AMZN" stands for Amazon Prime Video. It tells the user that this specific file was ripped or downloaded from Amazon’s streaming servers.

The show itself—a twisted narrative involving a prisoner on death row, a vicar in a quiet English village, and a journalist—became a viral hit due to its high-stakes tension. Because the show was distributed differently across various regions (BBC in the UK vs. Netflix/Amazon internationally), specific "AMZN" (Amazon) versions became highly sought after for their specific encoding and subtitle options.

To understand the quality and origin of the video, we have to break the string into its component parts:

Viewers who are building a digital home media library (using tools like Plex or Kodi) look for WEB-DL files because they include original metadata, subtitles, and high-bitrate audio that you don't get from standard "free" streaming sites.