title: OpenURL fails to open some very specific URL and shows error "Download Failed"
body: <p>I want to open some URLs with Safari browser of apple device. And my openURL function works fine most of the time. However when I tried to open this URL, it failed with the following <strong>error</strong>.</p>
  
  <blockquote>
    <p>Download Failed Safari cannot download file.</p>
  </blockquote>
  
  <p>Here is the URL that fails:
  <a href="https://www.youtube.com/v/QH2-TGUlwu4?version=3&amp;autohide=1" rel="nofollow noreferrer">https://www.youtube.com/v/QH2-TGUlwu4?version=3&amp;autohide=1</a></p>
  
  <p>Here is my code:</p>
  
  <pre><code>let url = "https://www.youtube.com/v/QH2-TGUlwu4?version=3&amp;amp;autohide=1"
  if let nsurl = NSURL(string: url){
      if UIApplication.sharedApplication().canOpenURL(nsurl){
          UIApplication.sharedApplication().openURL(nsurl)
      }else{
          print("Cannot open this NSURL.")
      }
  }else{
      print("Cannot convert String to NSURL.")
  }
  </code></pre>