Unfortunately, it is not possible to directly embed videos in your marketing emails via Revinate.
You can always add a link to the site where that video is located in your email (it would redirect guests to another URL) but we usually recommend not to overload emails with a lot of information since it can result in rendering issues.
These are the steps to follow:
In the "Design" step within the Campaign builder link/connect the Call to Action button with the External URL field located on the module editor (to the right- see screen shot for reference). This external URL will be the link to the site where the video is located- for example an ezine.
If you prefer to link up the external URL where your video is located to an image instead of a Call to Action button in your email you can always choose an image module.
You can upload a screen shot of an image of the video you want to use in your campaign with a play button on top of it (you can use Photoshop to add the play button to the image).