create-rewarded-video-ad.md

## uni.createRewardedVideoAd(option) @createrewardedvideoad

<!-- UTSAPIJSON.createRewardedVideoAd.description -->

<!-- UTSAPIJSON.createRewardedVideoAd.param -->

<!-- UTSAPIJSON.createRewardedVideoAd.returnValue -->

## Tips

+ uni-app x 标准基座激励视频广告测试广告位为`1507000689`
+ 激励视频广告目前仅支持API形式

<!-- UTSAPIJSON.createRewardedVideoAd.example -->

<!-- UTSAPIJSON.createRewardedVideoAd.compatibility -->

<!-- UTSAPIJSON.createRewardedVideoAd.tutorial -->

<!-- UTSAPIJSON.general_type.name -->

<!-- UTSAPIJSON.general_type.param -->