First of all - I dont believe in split timeline. I've decided to write my own timeline theory somewhere on
ZU (because I remember there was a forum for timeline theories).
Second - most of people on YouTube are actually kids down to 6 years old, who think that they know all there is to know about the subject, in this case - The Legend of Zelda universe. They've played all the games, know all the bosses and enemies, they know it all. Better then Know-It-All birds and brothers. It's really a loss of precious life time arguing with such people, because nothing you say will make them change their mind. Even if Miyamoto himself showed up and said "No, that's not true" he'd get a rock in his head or something.
So, don't be surprised with such remarks, just ignore them. If they say "Zelda is my life and I know that she is a HE", you just nudge your head and slowly walk away.