// Creates an RewardVideo.
public void CreateRewardVideoAd()
{
this.rewardVideoClientPtr = (IntPtr)GCHandle.Alloc(this);
this.RewardVideoPtr = YumiExterns.CreateYumiRewardVideo(this.rewardVideoClientPtr);
// call back
YumiExterns.SetRewardVideoCallbacks(
this.RewardVideoPtr,
RewardVideoDidOpenAdCallback,
RewardVideoDidStartPlayingCallback,
RewardVideoDidRewardCallback,
RewardVideoDidCloseCallback
);
}