Videos can significantly boost engagement rates, but they come with their own set of challenges. Here are some guidelines: - Use Thumbnails: Instead of embedding videos directly, use a thumbnail image linked to the video hosted on a platform like YouTube or Vimeo. - GIFs and Cinemagraphs: These can be a good alternative to videos, providing movement without the large file size. - Compatibility: Not all email clients support embedded videos. Check compatibility and have fallback options like a static image with a play button.