How to set up a reward video correctly?

Good Morning,

I am trying to set up a video with a reward, it works correctly, but I am not receiving the reward. I have done it in the following way, could you please tell me how to set it up correctly? Because after watching a video, it doesn’t show any more if you click on the button again.

In my game I have added to load the video at the start of the scene:

Then when you click it shows the ad, it also has a maximum of 5 ads, but that is not implemented yet:

So far, everything is working perfectly. Now comes the problem, I have added the condition that if you have received the video to mark it as received and add some coins, but it doesn’t add anything:

Thank you so much!