Embedding HTML5 videos in emails involves using the <video> tag within the email’s HTML code. However, it’s important to note that not all email clients support HTML5 video playback. Therefore, it's essential to include fallback options such as a static image with a play button that links to a hosted version of the video.
<video width="320" height="240" controls> <source src="movie.mp4" type="video/mp4"> Your browser does not support the video tag. </video>