src/js/plugins/youtube.js
function assurePlaybackState(play) {
    if (play && !this.embed.hasPlayed) {
        this.embed.hasPlayed = true;
    }
    if (this.media.paused === play) {
        this.media.paused = !play;
        triggerEvent.call(this, this.media, play ? 'play' : 'pause');
    }
}
function assurePlaybackState(play) {
    if (play && !this.embed.hasPlayed) {
        this.embed.hasPlayed = true;
    }
    if (this.media.paused === play) {
        this.media.paused = !play;
        triggerEvent.call(this, this.media, play ? 'play' : 'pause');
    }
}
Set playback state and trigger change (only on actual change)