HTML5 video, optimized animated .GIF video, and optimized animated .PNG videos are all supported. To account for the rendering and compatibility differences between mail clients and mobile devices, the system automatically creates, stores, and then publishes any one of over a dozen versions of each video asset in real time as each mail recipient opens the message.
Brands including Disney, HP, Costco, Discovery Communications, Holland America, KLM, IBM, Verizon Wireless and others have already launched video email campaigns using the service while in beta, and launch partners include Goodmail Systems and Return Path.