You can’t include a video in an email. Few email clients allow it. Bummer.
In the age of the Internet, some things are still backwards. Email can be considered medieval in that respect.
The solution: link to a video
Link to a video, but in a stylish way. For example, you can use an image like this in your newsletter which is a link to Youtube:
Download this player and lots of others, and the original Photoshop file in our blog.