How to track Youtube subscribe button events?

Question

YouTube

I need to track clicks on the "Subscribe" button from Google. Here there is a "generator" of the button and the option "Tracking clicks" - https://developers.google.com/youtube/youtube_subs...
I get the following code:

<script src="https://apis.google.com/js/platform.js"></script>

<script>
  function onYtEvent(payload) {
    if (payload.eventType == 'subscribe') {
      // Add code to handle subscribe event.
ga('send', 'event', 'button', 'click', 'nav-buttons');
    } else if (payload.eventType == 'unsubscribe') {
      // Add code to handle unsubscribe event.
    }
    if (window.console) { // for debugging only
      window.console.log('YT event: ', payload);
    }
  }
</script>

<div class="g-ytsubscribe" data-channel="GoogleDevelopers" data-layout="default" data-count="default" data-onytevent="onYtEvent"></div>

The event should be sent by the string "ga('send'...". There is a Google Analytics code on the site, events through the link with onclick are triggered, but the button with the code above does not work, tell me what to do?

Answer 1

I'm afraid that everything is bad:
https://code.google.com/p/gdata-issues/issues/deta...