Once the Modula Video extension is installed and activated, head to your gallery edit page. Click the edit icon on the image onto which you want to insert a video. This could commonly be the thumbnail of the video or a screenshot of a part of the video.
Scroll down in the image settings and paste your video’s URL – either from an external service like YouTube or Vimeo, or a link to the file in your WordPress Media Library.
That’s it! 🙂
For your reference, here’s a list of the lightbox styles that Modula is compatible with:
Magnific Popup/Swipebox only work with a YouTube link, not with a YouTube embedded link
Fancybox/LightGallery/PrettyPhoto only work with both a YouTube link & a YouTube embedded link
Lightbox: Not compatible with the Modula video extension.