jQuery(document).ready(function($){
  $(".ngg-gallery-thumbnail a").each(function (arr){
    if ($(this).attr("title").substr(0,5)=="video"){
      var thereltag = $(this).attr("rel").substr(0,22);
      $(this).attr("rel", thereltag + ";width=512;height=348");
      $(this).attr("href","http://www.youtube.com/v/" + $(this).children("img").attr("alt"));
     /* watermark var thesrctag = $(this).children("img").attr("src");
      $(this).children("img").attr("src", "/wp-content/gallery/film.php?path=" + thesrctag);*/
    }
  })
});