I followed the tutorial in https://www.youtube.com/watch?v=UOptam261Ts
with the test codes The game did not give me errors but it did not show me 
the video.
The code of the methods was not executed:
        OnAdStarted
        OnAdRewarded
        OnAdLoaded
        OnAdFailedToLoad 
        and the others taht i dont use.

Then I used my own application codes did not give me error.
The game continues without show me videos only remains loading or does not 
do anything.
My application was recently uploaded and I still can not find it in the 
Admobs PlayStore.
please help me I'll leave the Unity Log