Email programs cannot play videos within email. So when you see a video "embedded" in a newsletter, what you're actually doing is including a screenshot of the video and using it as a link to the video elsewhere on the web, such as YouTube or Vimeo. You can either do this screenshot/link manually, or if you're linking to YouTube, ConvertKit has an easy way to do that134.

Aaron HockleyCommunity Guru
Photographer, Writer, Consultant