How to embed youtube video in Rails view

you_tube_embed_example.html.erb

<% 
  video_code, video_width, video_height = 'nkYA1xqrdGw', 938, 555
  video_embed_params = { :fs => 1, :rel => 0, :hd => 1, :autoplay => 1, :modestbranding => 1, :version => 3, :enablejsapi => 1, :playerapiid => "ytplayer" }
  player_wrapper_id, player_id = 'ytPlayerWrapper', 'ytPlayer'
%>

<% unless mobile_safari_request? %>
  <% content_for :head do %>
    <%= javascript_include_tag "http://ajax.googleapis.com/ajax/libs/swfobject/2.2/swfobject.js" %>
  <% end %>
  <script type="text/javascript">
    $(function() {
      $(".how_it_works_video a.how_it_works_link").one('click', function() {
        $("#<%= player_wrapper_id %>").show();
        $(".how_it_works_video a").hide();
        swfobject.embedSWF("http://www.youtube.com/v/<%= video_code %>?<%= video_embed_params.to_query %>", "<%= player_wrapper_id %>", "<%= video_width %>", "<%= video_height %>", "8", null, null, { allowScriptAccess: "always" }, { id: "<%= player_id %>" });
        return false;
      });
    });
    var ytPlayer;
    var forceHD = true;
    function onYouTubePlayerReady(playerId) {
      ytPlayer = document.getElementById("<%= player_id %>");
      ytPlayer.addEventListener("onStateChange", "onYtPlayerStateChange");
    }
    function onYtPlayerStateChange(newState) {
      if (forceHD && newState === 3) { // we force HD only initially if user switch to something else we don't force it any more
        ytPlayer.setPlaybackQuality( 'hd720' );
        forcedHD = false;
      }
    }
  </script>
<% end %>

<section class="how_it_works_video">
  <div style="width:<%= video_width %>px;height:<%= video_height %>px">
    <%= link_to content_tag(:span)+image_tag("how_it_works_thumb.jpg"), "http://www.youtube.com/v/#{video_code}", :class => "how_it_works_link" %>
    <div id="<%= player_wrapper_id %>" style="display:none"></div>
  </div>
</section>