This once upon a time arte dos fãs might contain
sinal, cartaz, texto, quadro-negro, assinar, quadro de giz, anime, banda desenhada, manga, desenhos animados, mangá, and quadrinhos.
As i said in the video this theory isn´t mine i read it on this awesome OUaT fã page: link. I wanted to make a video because i thought the theory was really interesting, comment below :)