Play icon on images that have a video attached to them in the media library and in the product setup page

As it stands, there is no way to know which image has a video attached when creating a new product. I add maybe 10 product images and attach the video to one of them. When I reviist the product to make a change, there is no indication at all that any images have a video attached. When dealing with lots of products, this quickly becomes confusing. A simple play icon over those images with a video attached would make life a lot easier. Cheers