Download the watermarked preview legally (Shutterstock allows this for testing). Drop it into your timeline. Edit your entire video using the watermarked footage. This is called "comping."

Large library of free HD and 4K stock videos for personal and commercial use .

You can legally download a watermarked version of any Shutterstock clip by clicking the button on the video's page. This allows you to test the clip in your project or presentation before committing to a purchase.