I know there is a lot of work going on with the new UI and previews for records that do not contain a visual file. Might I suggest there be an option to allow for a provided thumbnail.
For example: we have a number of metadata records that serve as a "card catalogue" for our physical videos/imagery that have yet to be digitized. It would be nice to have those records have a thumbnail visual, like the following as a place holder to allow for a more visually appealing experience for our end users.
Customer support service by UserEcho