In order to download preview media for all the clips in a given Clipbin, please select the Clipbin in question and then choose the Actions -> Download All Preview Clips From Clipbin option.
Once all the preview media from the Clipbin has been downloaded, you will be notified via email with a link to download the clips from a .zip file. This preview download can also be found at the bottom of the Orders page when you are logged into your account. Please see the below image as an example.
If you wish to download clips that are not in a Clipbin, we advise adding the clips in question to a Clipbin so that you are able to download the preview media from the Clipbin. Please refer to our below Help Article for further guidelines on how to create Clipbins, add/remove clips to Clipbins and more.