Unfortunately, animated gifs don't work in Outlook. All you'll see of an animated gif in an Outlook client is the first frame of the gif. While that's a significant limitation (especially for B2B marketers, who usually have a larger percentage of Outlook users than B2C marketers), there is a work-around. Just create a first frame that also works as a static image.
Today, one of the biggest trends driving the digital marketing world is responsive design. When a company’s content doesn’t perform well on a given device or browser system, the business behind it loses traffic and suffers decreased conversions as a result. Fortunately, video content is fit for consumption on all devices, ranging from computers to mobile phones. This expands video’s reach and makes it more user-friendly and consumer-focused.