$(document).ready(function(){
  $("a[rel^='gallery']").prettyPhoto();
  $(".asset.video a img").load(function(){
    this.style.marginLeft = -((this.width - this.height)/2) + "px";
  });
  $(".asset.video a img").each(function(){
    this.style.marginLeft = -((this.width - this.height)/2) + "px";
  });
});