Tracking for any number of YouTube iframes. Uses a data-title attribute for grabbing a title.

youtube-event-tracking.js

// Any iframes with a class of .yt will be collected for event tracking
  var Youtube = {
			$players: $( '.yt' ),
			playerArray: [],
			numPlayers: $( '.yt' ).length - 1,

			init: function() {
				Youtube.assignID();
				Youtube.bindEvents();
			},

			// Give all videos a unique ID - video-0, video-1 etc...
			assignID: function() {
				var i = Youtube.numPlayers;

				for ( i ; i >= 0; i--) {
					$( Youtube.$players[i] ).attr( 'id', 'video-' + i );
				}
			},

			// For every video ID (which we set with assignID())
			// we will create a new 'YT.Player' and store within our playerArray []
			bindEvents: function() {
				var i = Youtube.numPlayers,
					videoID = null,
					$video = null;

				for ( i ; i >= 0; i--) {

					videoID = $(Youtube.$players[i]).attr('id');

					Youtube.playerArray[i] = new YT.Player( videoID , {
						events: {
							'onStateChange': function( e ) {
								if( e.data == YT.PlayerState.PLAYING ) {
									$video = $( e.target.a );
									_gaq.push( ['_trackEvent', 'YouTube Video', 'play', $video.data('title') ]);
								}
							}
						}
					});
				}

			}
		};