[YouTube-API] GA Tracking Suddenly Not working

I'm trying to track the number of play clicks on an iframe embedded youtube video. This was going fine, until I tried to add a new video and discovered that it wasn't working at all... for any videos. Did something in the API change? Here's the code:

var player;
 var hasTracked = false;
 var vframe = $('#video-iframe');


 if(typeof(YT) != 'undefined') {
 initiatePlayer();
 }
 else {
 var tag = document.createElement('script');
 tag.src = "https://www.youtube.com/player_api";
 var firstScriptTag = document.getElementsByTagName('script')[0];
 firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);
 }


 function onYouTubePlayerAPIReady() {
 initiatePlayer();
 }


 function initiatePlayer() {
 console.log('player initiating')
 player = new YT.Player('video-iframe', {
 videoId: vframe.attr('videoid'),
 events: {
  'onStateChange': onPlayerStateChange
 }
 });
 player.addEventListener('onStateChange', 'onPlayerStateChange');
 }


 function onPlayerStateChange(event) {
 console.log('it worked!')
 if(event.data == YT.PlayerState.PLAYING && !hasTracked) {
 hasTracked = true;
 }
 }

And the iframe looks like this:

<iframe width="295" height="230" id="video-iframe" videoid="u8MM2qq1GIV" trackinfo="click_goingback_play_3" src="https://www.youtube.com/embed/u8MM2qq1GIV?rel=0&amp;enablejsapi=1" frameborder="0"></iframe>

The video plays, there are no visible errors, I get the 'player initiating' message, but I never get the 'it worked!' message when I hit play. I swear this used to work! Does anybody have any idea what's going on? Did the Youtube API change? It doesn't work in any browsers.

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