I have an image as a thumbnail preview of a video that when a user click on it it load the video with a grey background. The following code work but it also pop up the error "The requested content cannot be loaded. Please try again later." that you can close the window. My code is below, been trying to understand why and fix this problem but I am lost.

<ul class="thumbnails">
<li class="span8">
<a data-fancybox-group="gallery" a href="#video2" data-title-id="title-1" data-toggle="modal" class="thumbnail zoom" title=""> <img src="img/screengrab.jpg" height="480" width="640" alt="">

<div class="modal hide fade" id="video2" tabindex="-1" role="dialog" data-width="900">
<iframe src="https://player.vimeo.com/video/25980883?color=E84E39&amp;title=0&amp;byline=0&amp;portrait=0&amp;autoplay=0" width="780" height="439"></iframe>