2013-11-20 iphone safariでyoutubeをみると上部にアプリへのバナーがでる ios ■ Smart App Bannerというやつらしい詳しくはここを https://developer.apple.com/library/mac/documentation/AppleApplications/Reference/SafariWebContent/PromotingAppswithAppBanners/PromotingAppswithAppBanners.html