As long as downloads have been enabled, then yes! On the review screen for the image or video, look to the side panel – you’ll see a button with a download arrow. Click this button to open the download panel, where you can select which encoded version of the asset you'd like to download. The topmost option. will be for the original, uncompressed version of the video, image, or audio file.
Downloading is disabled by default when you share. You'll need to toggle on the 'Allow downloads' option for the download icon to appear in the side panel for your external reviewers. Team members will always have the ability to download assets from your Media Library.