Here is the code I use to play a YouTube or Vimeo video in a Royal Slider gallery when a visitor clicks anywhere in the preview image, and not just when they click the Play button itself:
<script> jQuery(document).ready(function($) { $('.royalSlider').each(function() { var slider = $(this); $('.rsContainer').click(function() { slider.royalSlider('playVideo'); }); }); }); </script>