This article explains how to use the Close integration with Dubb.
Step 1 - Create a new Campaign or Email Sequence, or edit an existing one, then click Next.
Step 2 - Select and Edit your Email Template:
Step 3 - Insert Dubb Video into Email Template by clicking the Dubb icon in the Email Composition Toolbar, to get access to your library of videos, or to record a new video.
Step 4 - Save and Deploy your Campaign/Sequence.
Here is a detailed walkthrough video: