Metanostalgia
(1) The feeling you get when you feel nostalgic for a show or movie centered around nostaliga. i.e. nostalgia for That 70's show, Angry Video Game Nerd, Happy Days, The Wonder Years, A Christmas Story, etc.

(2) A nostalgic feeling for a time when you were nostaligizing.
Man, I feel metanostalgia watching that Angry Video Game Nerd video from 2004. It reminds me of the good old days of the internet before youtube fucked everything up and eveyone started making clickbait shit.