Can't say that Ruby's desired aesthetic is completely unfounded, apparently there is a huge demand for romantic victorian academia countryside whatever cosplay.
There is, for example, this girl "Darling Desi" who makes videos on similar topics (not studytube though) - and hers are way more over the top and ridiculous in some ways than Ruby's. But here you can actually tell how much effort goes into the production value and the aesthetics. And you really get the sense that this is a performance for the viewers, in a good way.