Images that have a script in them that can run in the browser with a ref-url or by renaming the extension
Summary
Smart images that can be shown as regular images, but when renaming the extension to .html or by using the forwarder.html services ( https://www.murdochbook.com/forward.html#https://i.imgur.com/DaTItNo.gif )
Create SmartGif
cat concatenate.gif index.html > out.gif