When the update came out I actually wrote a bit about it, but I think the Fanontinuum is some kind of late night talk show that aims to just bring more characters back into the spotlight after they are deemed no longer "relevant" in Canon. I think the Fanontinuum and the way it works is that the people interviewed on the show have to have an "audience" care about them in some way, which is why there's a whole audience of Nepeta's who are watching, and presumably other people outside of this small bubble are too since it is a TV Show after all.