The popularity of video also means that more content at the top of the funnel has to be in video format. In B2C it’s almost obvious. But B2B-people are people, too. Video content is more likely to keep the audience in the comfort zone, and they will not engage in system 2 thinking. System 1 autopilot mental state should lead to less critical thinking, less friction, and more conversions.
.GIFs are effective for images with simple graphics, limited colors, text images (like logos), etc. .GIFs usually are limited to 256 colors. But, it supports animation, so it is good for email design. Also, these files can be compressed into a smaller file size. Animated .GIFs do not support animation the way Flash files do, but allow you to add movement without much programming or coding. You can use jQuery to generate animated effects.