title: Swift 4 WebKit webView does not load URL with added parameter
body: <p>Just can't find out what is wrong with this <code>webView</code>, it just remains blank no error. If I try without a video id parameter and just "<a href="https://www.apple.com" rel="noreferrer">https://www.apple.com</a>" it works. Any ideas?</p>
  
  <pre><code>import UIKit
  import WebKit
  
  class VideoPlayerVC: UIViewController, WKUIDelegate {
  
      @IBOutlet weak var webview2: WKWebView!
      var videoId: String?
  
      override func viewDidLoad() {
        //test video id, this prints the booty workouts id on youtube!This target also opens on youtube the id on the end of this url: https://www.youtube.com/watch?v=695PN9xaEhs
          if let videoId = videoId {
              print(videoId)
          }
  
          webview2.load(URLRequest(url: URL(fileURLWithPath: "https://www.youtube.com/watch?v=\(videoId)")))
      }
  }
  </code></pre>