var webView = (WebView)FindViewById(Resource.Id.JackKnifeVid);
WebSettings settings = webView.Settings;
settings.JavaScriptEnabled = true;
webView.SetWebViewClient(new WebViewClient());
webView.LoadUrl("https://www.youtube.com/watch?v=CWOZyf8kaH0");
It only plays a video but showing a black screen.