[Plugin: FancyBox for WordPress] Using a Headway Theme and I can't work Fancybox

I use a Headway drag and drop theme on my wordpress site
I want to use a plugin that uses Fancy Box and I don’t know why I can’t see fancybox options when I am creating a page and adding videos.

How do I get it to all work together?

https://www.ads-software.com/extend/plugins/fancybox-for-wordpress/