My friend told me that his favorite character is FunSubs and his headcanon is that FunSubs is Dominican and Puerto Rican and that he speaks Spanish and plays dominoes, not a very interesting headcanon but whatever.
His other headcanon is uhh... strange to say the least. It's that Jives pisses rainbows. Like I said, strange. But oh well, it's good to know that idiots viewers have opinions on the characters.
Edit: he added more to his funsubs headcanon, he says that funsubs eats plantains and dances a bachata.