In the Neilson study email marketing has the highest ROI of 675% when compared with any of the other major marketing methods. For a report on ROI (returns on investment) click this link.
You can't put cartoon videos in an email campaign, however you can display poster images which link to the landing page where your video is located. You can use these poster images and links on your website or blog, in email campaigns, and on social media.
Two of the most popular email marketing servers are Mailchimp and Constant Contact. Here are video tutorials about both: