HELP!!! I need to add video to nextgen

Please help me I am kind of new at html but I am trying to add a video gallery to the media page at site https://www.andayaonline.com

i’ve read all these things saying i need to add this:
jQuery(document).ready(function($){
$(“.ngg-gallery-thumbnail a”).each(function (arr){
if ($(this).attr(“title”).substr(0,5)==”Video”){
$(this).attr(“rel”,”shadowbox;width=405;height=340″);
$(this).attr(“href”,$(this).children(“img”).attr(“title”));
}
})
});

ok…..WHERE?

I also have shadowbox installed and I don’t think that is working, but i really don’t know. It’s setup and activated. Do I need that if i can get videos to upload through nextgen? I’ve tried many other plugins with no good results. I want a nice clean professional look. Please Help!