index.html

## index.html
<!DOCTYPE html>
<html>
<head>
  <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
  <meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
  <link rel="stylesheet" href="http://libs.cartodb.com/cartodb.js/v3/3.15/themes/css/cartodb.css" />
  <style>
      html, body, #map {
        height: 100%;
        padding: 0;
        margin: 0;
      }
      div.cartodb-popup.v2 {
        width: 430px  !important;
        height: 325px;
      }
  </style>

</head>

      <body>
        <div id="map"></div>
      </body>

   <script type="infowindow/html" id="infowindow_template">
      <div class="cartodb-popup v2 dark">
        <a href="#close" class="cartodb-popup-close-button close">x</a>
         <div class="cartodb-popup-content-wrapper">
           <div class="cartodb-popup-header">
            <iframe width="400" height="280" src="{{content.data.youtube_url}}" frameborder="0" allowfullscreen></iframe>
           <div class="cartodb-popup-content">
             <h4>{{content.data.name}}</h4>
           </div>
         </div>
         <div class="cartodb-popup-tip-container"></div>
      </div>
      </script>

   <script src="http://libs.cartodb.com/cartodb.js/v3/3.15/cartodb.js"></script>
   <script async src="http://platform.twitter.com/widgets.js" charset="utf-8"></script>

      <script>
        function main() {

          cartodb.createVis('map', 'https://team.cartodb.com/u/chandra/api/v2/viz/fd5891d6-7db4-11e5-84fe-0e31c9be1b51/viz.json', { description: true, search: true, shareable: true })
          .on('done', function(vis,layers) {

            var layer = layers[1].getSubLayer(0);
            layer.infowindow.set('template', $('#infowindow_template').html());
            layer.infowindow.set('sanitizeTemplate', 'false');

            layer.on('error', function(err) {
               console.log('error: ' + err);
             });

          }).on('error', function() {
            console.log("some error has occurred");
          });

        }

        window.onload = main;

      </script>

      </html>