title: RewardBasedVideoAd is couldn't found on scripty
body: <p>Im trying to add RewardBasedVideoAd to my game by watching this video: <a href="https://www.youtube.com/watch?v=TwNzVBq2Dtk&amp;t=0s" rel="nofollow noreferrer">https://www.youtube.com/watch?v=TwNzVBq2Dtk&amp;t=0s</a>. But, RewardBasedVideoAd cannot found on using GoogleMobileAds.Api; Can u help me pls?<a href="https://i.stack.imgur.com/fHoFB.png" rel="nofollow noreferrer">enter image description here</a></p>