make vimeo embeds responsive

app.js

// Responsive Vimeo Embed: http://css-tricks.com/NetMag/FluidWidthVideo/Article-FluidWidthVideo.php
var $allVideos = $("iframe[src^='//player.vimeo.com']");

$allVideos.each(function() {
  $(this)
    .data('aspectRatio', this.height / this.width)
    .removeAttr('height')
    .removeAttr('width');
});

$(window).resize(function() {
  $allVideos.each(function() {
    var $el = $(this);
    $el.width( $(this).parent().width() ).height( $(this).parent().width() * $el.data('aspectRatio'));
  });
}).resize();