I used a hombrew program called In-Home-Switching, it streams from pc to nintendo switch. NSW controllers didn't work with ffxi with my configuration(I use wii u controller connected to pc).
Steam games worked perfectly(I played Monster Hunter World).
I'm wondering the same thing. I don't own a switch, but would go out and buy one today if I could port FFXI over.
I think he's just viewing a picture because of the windower distance plugin