Facetime feature

Hi guys! I’m attempting to make a Facetime feature with UI. I want the screen to look like a facetime where your player view is in a box on the top right while the rest is your friend. I want the feature to encapsulate the entirety of both parties’ environments and move along with the player. How can I accomplish this using viewport frames?

The closest thing is a portal, but in the UI, it would be cutting the code that makes the portal work and placing it in a UI.