I've been watching 'The Mighty Nein' with my boyfriend, and from an outside perspective we'd just look like two folks enjoying a show.
My boyfriend knows nothing about the original campaign, and even if I had shared details with him when I was watching it, he's long since forgotten them. So he's enjoying the show as a general viewer who likes D&D.
MEANWHILE
I have seen every episode and special (sans C3, but I plan to restart that soon) and I've read Mollymauk's book
Every episode that brings in characters with long term story consequences or they make allusions to a past event that hasn't been openly talked about by the character, is making me do this internally:
After last night's episode my boyfriend asked, "What's up with our Sea Orc?" I had to stare him dead in the eye and tell him, "I ain't telling you nothing" WHILE I ABSOLUTELY WANTED TO TELL HIM EVERYTHING!