How to add picture to description

I see some sellers have a very nice laid out description that includes pictures and animated .GIFs.
I tried to add pictures but after a week or so it disappears.
Anybody know how to add animated .GIFs (I want to make animated .GIF of a product) and pictures?

Hey digitaluncool,

I’m sorry to hear that you experiencing issues with your listing. If these product listing issues still persist you can contact Tindie support at support@tindie.com.

One of our agents would be more than happy to assist you.