WP Video Popup is a plugin for WordPress that creates a lightbox for YouTube & Vimeo videos.
Create beautiful responsive YouTube & Vimeo lightbox popups in WordPress.
I found the faq and explanation a little difficult to understand. I feel it’s trying too hard to push the PRO version
[ wp-video-popup video="video url goes here" ] <-- remove space after [ and space before ] <a class="wp-video-popup" href="#">Play Video</a>