Isn't the buttons to use the sword always on the right?
It seems to me like he is avoiding actually answering the question than a true serious response.
I don't think this Link is any of past Links exactly because he is right handed. The only canonical right handed Link is Skyward Sword one, but is impossible to be him, since Ganon and Hyrule kingdom are already established in BoTW.
To be fair maybe slashing is the A button this time (button most to the right). The B button on the NES controller is to the left, and I think its always been the button to the left before.