Start game with editor scripts? Get scene camera while playing?

Hello! I have a level editor that runs inside the Unity editor. I would love to give the level designers the ability to press a button and play what they are looking at.

Basically, I want to know the initial center of the scene view when the game is running. We use an orthographic camera. I plan on using Camera.ViewportToWorldPoint().

Option A: Apparently I can get the scene camera in editor scripts through...

Start game with editor scripts? Get scene camera while playing?