Market research has shown that users have higher engagement with, and generally prefer both micro-form video (< 1minute) and cinemagraphs (stills with subtle movement), over longer-form videos and still images. Animated GIFs are great for user experience.Evolution of <img>: Gif without the GIF
You can search for DOCTYPEs all day at w3.org without finding one page that lists them all. And when you do hunt down a DOCTYPE (generally in relation to a particular Recommendation or Working Draft), it’s often one that won’t work on your site.Fix Your Site With the Right DOCTYPE!
