At this point it just seems a case of he-said-she-said.
And she said it on Tumblr. A lot of things can be and are said on Tumblr and almost all of it is empty bs.
I don't know either of them so I can't really say who's telling the truth or not. But with the accusations being Tumblr drama, they're not going to come to anything (unless someone else decides to have a go at Tobuscus and bring charges).
Most of all I could care less about Tobuscus, but I'm worried this will create a wave of crap rippling outwards across Youtube, and someone is going to make bs allegations against Markiplier or something, amongst other Youtubers.
Also as a final observation, it's annoying because false accusations just make life harder for genuine victims, it's really the most classless thing someone can do, show some respect for real victims, Tumblrinas.
Anyway maybe Tobuscus is a rapist, maybe not. until these claims reach a court of law we'll never know.