Due to limitations in most email clients, it is not possible to directly embed videos email templates. Instead, you can share the video in three other ways.
1. Link to the external page where the video is embedded through a hyperlink in a photo or text.
2. Link to an Upsales landing page where the video is embedded (Landing pages supports Vimeo and YouTube videos).
3. If the file size of the video is below 25MB, you can include the video as an attachment.