[zgood]

Specifying the type as iframe seems to make it work.

$( document ).ready(function() {
   $( ".youtube_box" ).click(function() {
      var YouTubeID = this.id;

      $.fancybox({
          href : 'https://www.youtube.com/embed/' + YouTubeID + '?autoplay=1'
      }, {
          type: 'iframe'
      });
   });
}); 

See this Fiddle.

[Author]

Posts