You mean the video games?
There is also a TV adaptation that came out on Netflix a few years ago.
I guess GP is hinting that referring to TLoS as a TV series is a bit similar to, say, referring to LotR as a movie series (when discussing the basic premise shared by the original and the adaptation).
Reminds me of this scene: https://clip.cafe/airheads-1994/uh-67-copies-of-moby-dick/?s...
It's HBO Original actually