Show a rewarded video on Android with adMob

Hello, I’m trying to set a function which would display an ad and, if shown, call another function. I found a lot of tutotials on Internet but each was different from each other… Can you help me in finding a simple way to do that ?
Thanks.

@username
When your rewarded video complete then HandleRewardBasedVideoRewarded callback fires and you can call your function.

using System;
using UnityEngine;
using GoogleMobileAds;
using GoogleMobileAds.Api;
using System.Collections;
public class RewardedVideoScript : MonoBehaviour
{
	const string adUnitIdRewardedVideo = "ca-app-pub-xxxxxxxx/xxxxxxx";   // Your Key
	protected  RewardBasedVideoAd rewardBasedVideo;

	void OnEnable ()
	{
		
		rewardBasedVideo = RewardBasedVideoAd.Instance;
		// RewardBasedVideoAd is a singleton, so handlers should only be registered once.
		rewardBasedVideo.OnAdRewarded += HandleRewardBasedVideoRewarded;

	}
	void Start ()
	{
		RequestRewardBasedVideo ();
	}
	void OnDisable ()
	{
		rewardBasedVideo.OnAdRewarded -= HandleRewardBasedVideoRewarded;
	}
	protected AdRequest createAdRequest ()
	{
		AdRequest request = new AdRequest.Builder ().Build ();
		//		.AddTestDevice(AdRequest.TestDeviceSimulator)       // Simulator.
		//		.AddTestDevice("E32C2E79AD1DAE9D9AE99EF4F61E80ED")  // My test device.
		//		.Build();
		return request;
	}

	public void RequestRewardBasedVideo ()
	{

		rewardBasedVideo.LoadAd (createAdRequest (), adUnitIdRewardedVideo);
	
	}

	public void ShowRewardBasedVideo ()
	{

		if (rewardBasedVideo.IsLoaded ()) {
			rewardBasedVideo.Show ();
		} else {
			RequestRewardBasedVideo ();
		}

	}
	public void HandleRewardBasedVideoRewarded (object sender, Reward args)
	{
		//Call your function here

	}
}