Placeholder for Videos with no URL in CMS

I’d like to be able to design the “empty state” of videos, images, and text on template pages where the CMS field in the collection to which the element is dynamically calling is empty. For example, on a user profile there might be a video so there is a field to enter the video URL in the CMS. But if the field is left blank I would like to be able to design a placeholder image or text to appear instead.