Ad Manager that deals with Unity Ads between gameplays

AdManager.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Advertisements;

namespace Ngu
{
    public class AdManager : MonoBehaviour
    {

        public bool isAdRunning = true;

        public void PlayAdvertising()
        {

            var options = new ShowOptions { resultCallback = HandleShowResult }; // TODO: (?)

            if (Advertisement.IsReady("video")) //placement ID parameter, can be others from https://operate.dashboard.unity3d.com/ Overview > Monetization > Placements, pe: rewardedvideos cannot be skipped.
            {
                Advertisement.Show("video", options);
                Time.timeScale = 0; // Pauses game while the add is running
            }
        }

        private void HandleShowResult(ShowResult result)
        {
            switch (result)
            {
                // TODO: Seems that in TEST MODE, if I click on "close", the ad result is shown. Test this on real to see if is the same case.
                case ShowResult.Finished:
                    Debug.Log("The ad was successfully shown.");

                    // YOUR CODE TO REWARD THE GAMER

                    break;
                case ShowResult.Skipped:
                    Debug.Log("The ad was skipped before reaching the end.");
                    break;
                case ShowResult.Failed:
                    Debug.LogError("The ad failed to be shown.");
                    break;
            }
            Time.timeScale = 1; // Restarts game
            isAdRunning = false; // Game returns to normal after we have an ad result
        }
    }

}

/* Calling the script: This part is added within the GameManager, or when it should be called specifically */

AdManager adManagerScript;

adManagerScript = GetComponent<AdManager>();
adManagerScript.PlayAdvertising();