How do I Create a 4 player split screen?

Hello, i am trying to create a game where there are four players, each on a split screen. i have seen Give me a Pixel's tutorial, but i still don't fully understand the system behind it. anyone mind explaining how it works?

thanks

It shifts the viewport to a second players point of view and "pastes" it onto the canvas, then moves the viewport back. This happens every tick, so the canvas shows the offset view. For 4 players, you would need to reposition 4 times and paste to 3 separate canvas objects. I'm not certain this will actually work though, since there were some odd quirks with paste timing iirc.

Ok, thank you for info i appreciate it!