Click the edit (pencil) icon in any campaign or in the Message Manager to edit an email message or click the green "+" icon to create a new email message.
Click on the plus "+" (more rich) icon followed by the embed URL icon.
Copy and paste the video URL into the field.
Click Insert.
Note: Video must be hosted online.
Video hosting options are YouTube, Vimeo, Wistia, etc...
Currently URLs for YouTube Shorts cannot be embedded in emails.
A workaround is to create a static image (.png) or a GIF image of the Shorts with a play button on it. This lets the patients know that they will be redirected to a video. Upload the image with the play button to the email and then link it to the YouTube Shorts video.