Use Google Sites File Cabinet Templates to Create a B-Roll Media Gallery
Over the years I've written a lot about the idea of creating b-roll galleries of images, videos, and sounds for your students to use in their multimedia projects. In building a gallery of media that you and your students have created, you're building a resource that students can dive into when they need media for their projects. Google Sites is one platform on which you could build a gallery of media. Use the "file cabinet" template to create a page in your Google Site. Then use Custom Page-level Permissions to allow your students to upload and download media on that page. Video directions for using Page-level Permissions are available here.