I been waiting for the day when Outlook will get GIF support and it is here. I been creating GIF to explain a situation or when creating troubleshooting mailer. Now that outlook has given support to GIF, I can draft GIF embedded mail with more grace. So effectively another dimension i.e.time has been added to my mails. I use ScreentoGIF to create GIF and it is a nice piece of software with ton of option to edit your recorded GIF like reducing delay between frames, reducing adding transition, adding caption..etc. One thing I recommend is adding a progress bar, so that user intuitively knows at what state the animation is in, when he/she starts noticing it.