Release names use shorthand to describe the quality and source of the video file: Nanban (2012)

(for a file or release note):

: Indicates the source was a high-quality web stream (like Hotstar). : The video compression standard used. Important Note on Piracy

While analyzing such labels is technically interesting, it’s worth noting:

: "CPTN5DW" is likely a specific internal identifier or tag used by a release group. The term "Team Nanban" is a known group that releases cracked software and high-quality media rips.

Just let me know which angle you prefer, and I’ll write a full, original, and exclusive blog post for you.