What is the best way to split screen my Xbox One to two different TVs? Can you play 2/3/4 split screen games on two TVs without all players duplicated in both screens?
unfortunately you cannot do this. You can split the signal with HDMI splitter (which mirrors the image), but it will be completely duplicated. You need two Xboxes if you want to display two players' screens in two different TVs.
If your TV includes a zoom function, you can sort of do it by zooming to the desired player's screen, but it's a bit of a hack.
If you have a passive 3D TV, you can do it with one TV! For example, "Dual Play" is built by LG to give you full-screen mode instead of split-screen (I think only LG has passive 3D TVs! But I'm not sure :D) There is an instruction here on how to do it: https://www.tweaking4all.com/video/gaming/split-screen-game-full-screen/