title: How to play youtube in portrait full screen mode when use WKWebView
body: <p>I have upgraded to iOS 11.0.3 for my mobile phone. It seems before upgrading, I kind of able to play Youtube in portrait in fullscreen mode but now I was not able to do so. I am not sure which is which.<br/></p>
  
  <p>In my code, I use the following in <code>ViewDidLoad</code>:</p>
  
  <pre><code> let webviewConfiguration = WKWebViewConfiguration()
  webviewConfiguration.allowsInlineMediaPlayback = true
  </code></pre>
  
  <p>for the URL :</p>
  
  <pre><code>let usrl = URL(string: https://www.youtube.com.......+"?playsinline=1"
  </code></pre>
  
  <p>What I need to do.</p>