Hey no worries – you have created a very valuable plugin in that it provides easy end user support to just paste a video link and be done with it.
If you were able to keep that functionality but instead of displaying the video it kept the post thumbnail, then when you click on the post thumbnail it either lightboxes out the video or replaces the thumbnail with the video. This has a couple advantages:
- Decreases pageload by not rendering the video code on page load
- Allows you to maintain better design by being able to customize a proper image and a custom play button on top
The WP Lightbox plugin only adds the functionality to be able to lightbox out. It doesn’t replace the featured image as your wonderful plugin does.