This method uses the built-in webflow lightbox to display your CMS items.
By utilising an HTML Embed object within a Dynamic list you can make various aspects of the code dynamic by pulling the unique info into the coding via the "+ Add Field" option.
The Dynamic list galleries below will now show the visual results in the editor view, but will do so when the website is published.
Got captions added in. However still working on getting a way to put video into the dynamic lightbox, haven't quite got it yet.
EDIT: Dec 15, 2016