Added Google Tag Manager flag to the embedded YouTube video container.

Author: tomasfn87

index.html

@@ -492,7 +492,7 @@ <h2>Analysis Result:</h2>
                         iframe.height = '315';
 
                         iframe.src = `https://www.youtube.com/embed/${videoId}`;
-                        iframe.src += '?enablejsapi=1';
+                        iframe.src += '?feature=oembed&enablejsapi=1';
                         if (r.parts.parameters.obj.hasOwnProperty('t')
                             && /\d+/i.test(r.parts.parameters.obj.t)) {
                             iframe.src += '&start='
@@ -505,8 +505,8 @@ <h2>Analysis Result:</h2>
                         }
                         iframe.src += `&origin=${encodeURIComponent(
                             window.location.hostname)}`;
-                        iframe.src += `&widget_referrer=${encodeURIComponent(
-                            window.frames.top.document.referrer)}`;
+                        
+                        iframe["data-gtm-yt"] = "true";
 
                         iframe.frameBorder = '0';
                         iframe.allowFullscreen = true;