gistfile1.js

var closestvideo = {
	video: null,
	difference: Number.MAX_VALUE
};

var videos = json.feed.entry;
$.each(videos, function () {
	var duration = this.media$group.yt$duration.seconds;
	console.log("song duration:", song.duration);

	var durationdifference = Math.abs((parseFloat(song.duration) - duration));
	if (closestvideo.difference > durationdifference) {
		closestvideo.video = this;
		closestvideo.difference = durationdifference;
	}
});


var closestvideo = _.sortBy(videos, function (video) {
	var duration = video.media$group.yt$duration.seconds;
	var durationdifference = Math.abs((parseFloat(song.duration) - duration));
	return durationdifference;
})[0];