Youtube iframe API - Eventos baseado no tempo atual do video (current time events)

current-time-events.html

<div id="player" data-video-id="ZZ5LpwO-An4"></div>

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript">
    var tag = document.createElement('script');
    var firstScriptTag = document.getElementsByTagName('script')[0];

    // O container do video
    var playerDiv = $('#player');

    // inicializando o player
    var player;

    var videoDuration = 0;

    // inicializando o contador do tempo do video
    var videotime = 0;

    // inicializando intervalo
    var interval = null;

    var lyrics = {
        2: 'And so I cry sometimes When I\'m lying in bed just to get it all out',
        7: 'What\'s in my head',
        10: 'And I, I am feeling a little peculiar',
        16: 'And so I wake in the morning',
        18: 'And I step outside',
        19: 'And I take a deep breath and I get real high',
        23: 'And I scream from the top of my lungs',
        25: 'What\'s going on?',
        29: 'And I say, hey yeah yeah, hey yeah yeah',
        36: 'I said hey, what\'s going on?',
        43: 'And I say, hey yeah yeah, hey yeah yeah',
        49: 'I said hey, what\'s going on?',
        57: 'And he tries, oh my god do I try',
        62: 'I try all the time, in this institution',
        70: 'And heeeee prays, oh my god do I pray',
        76: 'I pray every single day',
        80: 'For a revolution',
        85: 'And I say, hey yeah yeah, hey yeah yeah',
        91: 'I said hey, what\'s going on?',
        100: 'Chega... dá trabalho demais sincronizar'
    };

    // Adicionando Youtube iframe API
    tag.src = 'https://www.youtube.com/iframe_api';
    firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);

    // Método chamado automaticamente pela api do youtube
    function onYouTubeIframeAPIReady() {
        player = new YT.Player('player', {
            height: 450,
            width: 800,
            videoId: $(playerDiv).attr('data-video-id'),
            events: {
                'onReady': onPlayerReady
            },
            playerVars: {
                rel: 0,
                showinfo: 0
            }
        });
    }

    // Método chamado nos eventos do player
    function onPlayerReady(event) {
        // obtendo a duração do video, em segundos
        videoDuration = parseInt(player.getDuration());

        // aplicando o intervalo de 1 em 1 segundo
        interval = setInterval(discoverTime, 1000);
    }

    // método utilizado para descobrir o tempo atual do vídeo
    function discoverTime() {
        if (player && player.getCurrentTime) {
            videotime = parseInt(player.getCurrentTime());
        }

        if (videotime < videoDuration && lyrics[videotime] !== undefined) {
            fireEvent(videotime);
        }

        if (videotime > videoDuration) {
            clearInterval(interval);
        }
    }

    // Aqui vem sua lógica para que algo seja feito ao atingir o tempo desejado no video
    function fireEvent(index) {
        console.log(lyrics[index]);
    }
</script>