Before you can insert any type of clickable link or object into an email -- not to mention a YouTube video thumbnail or image -- you must use an email client that allows you to create HTML ...

Add overlays, control the video timeline, insert subtitles, and offer localized content. Create new experiences with interactive HTML5 video.

An embed code provides HTML markup that makes it possible to stream a YouTube video on an external Web page. However, although individual YouTube videos can be embedded on other Web pages, so can ...

If you want to embed a YouTube video in email, you can simply copy and paste the link — a video preview should appear for the recipient.