Added a script to the scene that both hides and locks the cursor. You can now operatee the camera without this being seen on screen.

game/Assets/HideandLockCursor.cs

@@ -0,0 +1,19 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class HideandLockCursor : MonoBehaviour
+{
+    // Start is called before the first frame update
+    void Start()
+    {
+        Cursor.visible = false;
+        Cursor.lockState = CursorLockMode.Locked;        
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        
+    }
+}

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game/Assets/Scenes/Main.unity

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