Question: How can I create an image or video sitemap with just the images or videos (no other URLs)?
Answer: The short answer is that you can’t. This is not a limitation of Sitemap Creator; the sitemap protocol does not allow it due to the sitemap structure. (No sitemap generator can make a valid Video or Image Sitemap with just images or just videos and no pages.)
Your sitemap is a guide to helping search engines determine which pages hold specific content on your website. When a video or image result is displayed in Google, and the user clicks that image or video search result, they are sent to a page on your website that has that image or video. Without any page information, Google wouldn’t be able to direct searchers to the appropriate place on your website.