Unity Ads not Showing Up

Hello,

I'm pretty sure this may be posted a lot on here, but I unfortunately cannot find a thread that helps my issue. Whenever I try to load an ad, nothing shows up, it just continues on with the game. It says it has initialized with my ID (Initialize(myandroidgameid, True)). I have test mode enabled and I have changed my company and product name for the game if that matters. If you have any questions, please ask, as I'm sure I accidentally left out some details. Help would be greatly appreciated.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.Advertisements;
5. public class Ads : MonoBehaviour
6. {
7.     void Update()
8.     {
9.         if(Input.GetKeyDown(KeyCode.E)) {
10.             if(Advertisement.IsReady("video")) {
11.                 Advertisement.Show("video");
12.             }
13.         }
14.     }
15. }
16.