In your Playable account, go to Videos.

Select the video to add to your Convertkit Email Template.

Click on the Embed tab.

Select 'Convertkit' from the dropdown list and hit the Copy To Clipboard button to grab the Embed Code.

In your ConverKit account, click on Send and then E-mail Templates.

Click New e-mail template and then choose one of the already created ones.

Select where you want your video featured, and click the plus symbol. Scroll down until you see this:

Add the previously copied Embed code and paste it on the new HTML window.

Hit the Save button on the bottom right and the video should start working immediately.