I've created a simple tool to help you generate the markup required to display the features when your email is featured in the Top Promotions section in Gmail's Promotion Tab (Note there is no guarantee that your email will be featured).
Kristian Robinson implemented a technique to display a set of videos using JPEG sprites for UK's Channel 4. This technique involves converting a video into a grid of scenes in JPEG and using CSS animation display the "faux-video"...
I recently learned that its possible to change the stacking order of elements without using z-index. This can be done by using other CSS properties to create what is called a new "stacking context"...
Cheetah Digital (Formerly Experian Cross Channel Marketing) released their 2016 Q4 Quarterly email benchmark report earlier this year. A portion of their report covered the topic of Kinetic or Interactive Email. There report gives a good overview on what kinetic email can