Vimeo API and Backbone View

gistfile1.js

var Backbone = require('backbone');
var template = require('templates/video');
var $ = require('jquery');
module.exports = Backbone.View.extend({
  videoUrl: '//player.vimeo.com/video/119777338',
  events: {'click button': 'playButtonPressed'},
  render: function () {
    $(this.el).html(template({url: this.videoUrl}));
    $('body').append(this.el);
    this.$player = $('iframe');
    this.url = window.location.protocol + this.$player.attr('src').split('?')[0];
    this.$status = $('.status');
    this.listenMessages();
  },
  listenMessages: function () {
    if (window.addEventListener) {
      window.addEventListener('message', _.bind(this.onMessageRecieved, this), false);
    }
  },
  onMessageRecieved: function (e) {
    var data = JSON.parse(e.data);
    switch (data.event) {
      case 'ready':
        this.onReady();
        break;
      case 'playProgress':
        this.onProgress(data.data);
        break;
      case 'pause':
        this.onPause();
        break;
      case 'finish':
        this.onFinish();
        break;
    }
  },
  _onReady: function () {
    this.$status.text('ready');
    this.post('addEventListener', 'pause');
    this.post('addEventListener', 'finish');
    this.post('addEventListener', 'playProgress');
  },
  _onProgress: function (data) {
    this.$status.text(data.seconds + 's played');
  },
  _onPause: function () {
    this.$status.text('paused');
  },
  _onFinish: function () {
    this.$status.text('ready');
  },
  _playButtonPressed: function (e) {
    this.$status.html('play');
  },
  _post: function (action, value) {
    var data = {method: action};
    if (value) {
      data.value = value;
    }
    var message = JSON.stringify(data);
    this.$player[0].contentWindow.postMessage(message, this.url);
  }
});