To help you decide whether or not you want to download an asset for your project, you can download a short preview of the file first.
Just go to the product page, for the item you're thinking of downloading, and click the Download the preview button positioned under the asset.

You can also download video previews from any of our stock video, stock motion graphics or stock photos categories:

You do not require a paid plan in order to download previews. You can download previews with a free account.