Simple Unity Ads Integration with Callbacks

example.cs

UnityAds.ShowRewardedAd("AdRewards", delegate(bool result)
{
    if (result)
    {
	//Reward
    }
    else
    {
	//Message?
    }
});

SimpleUnityAds.cs

using UnityEngine;
using UnityEngine.Advertisements;

public class UnityAds : MonoBehaviour
{

	private static UnityAds _instance;
	public static UnityAds Instance
	{
		get
		{
			if ( _instance == null )
			{
				_instance = FindObjectOfType<UnityAds>();
			}
			return _instance;
		}
	}

	void Awake() {
		Advertisement.Initialize("~~~~~YOURGAMEIDHERE~~~~~", true); // ...initialize.
	}

	public static void ShowRewardedAd(string adIdentifierString, System.Action<bool> onVideoPlayed)
	{

		Debug.Log(string.Format("Platform is {0}supported\nUnity Ads {1}initialized",
		Advertisement.isSupported ? "" : "not ", Advertisement.isInitialized ? "" : "not "));
		
		if (Advertisement.IsReady (adIdentifierString)) {
			Advertisement.Show (adIdentifierString, new ShowOptions {
				resultCallback = result => {
					switch (result)
					{
					case (ShowResult.Finished):
						
						Debug.Log("The ad was successfully shown.");
						//
						// YOUR CODE TO REWARD THE GAMER
						// Give coins etc.
						onVideoPlayed(true);
						break;
					case (ShowResult.Skipped):
						
						Debug.Log("The ad was skipped before reaching the end.");
						onVideoPlayed(false);
						break;
					case (ShowResult.Failed):
						
						Debug.LogError("The ad failed to be shown.");
						onVideoPlayed(false);
						break;
					}
				}
			});
		}

		onVideoPlayed(false);
	}

}