step 1: make a bookmark of literally anything u want and name it "Animated Thumbnail" step 2: go to this YouTube video and copy the javascript from the description and paste the javascript as your URL https://www.youtube.com/watch?v=JIH_ex0Jy6I step 3: go onto any of your scratch projects, click on your new bookmark, and upload/drag 'n drop a small (as in file size) gif. step 3 1/2: create or find a gif step 4: go to your stuff page and check if it worked. repeat step 3 when needed step 5: be happy
credits to the guy who made the YouTube video