In Unity in an empty scene, u add a camera, the engine automatically makes the camera as the primary camera when pressing play and u can change the camera location, rotation etc by attaching a script to the camera or on the linked object of the camera.
In UE4 I managed to figure it out how (by dumb luck) to manipulate the camera by creating my own blank gamemode, controller and pawn and setting them to the gamemode properties like in the image.
I can manipulate the camera by manipulating the pawn.
I find this set up strange, why not control the camera directly like in Unity by adding it to the scene ?