Most email clients can't display a playing video inside an email.
Often businesses will include a single screenshot from a video and include a play button over the image to simulate the look of a playable video from within an email client, that simply links to a video hosted on a website or service like YouTube.
If you're using an email marketing service to assemble rich email with links and images like MailChimp or Constant Contact, first, follow our guide to downloading your video on either desktop or mobile. Then check out one one of these guides below to add your video.
Constant Contact — Insert a video
MailChimp — Add video to a campaign
GetResponse — Add a video to a message
If you use another email marketing service — follow their guides for inserting images and linking them, and feel free to contact our Support team if you'd like to see the guide linked to in this article.