Heya! Ill show you how i made an animated thumbnail Step 1. Convert your image to jpg or png using convertio.co (recommended if your image is a SVG image.) Step 2. use ezgif.com and put your file in, then make your gif 24 frames by copying the image and set the delay to 5. (Dont forget to save it!-) Step 3. Use Photomosh.com to add effects to your gif, make sure you click gif and the top left corner, click RECORD (not mosh!) to save your effects. Be sure to save the gif Step 4!!! GO to this site and save the bookmarklet https://worldlanguages.github.io/animatedThumbnailsBookmarklet/ Step 5: Go to your project in editor and put the gif in! (Make sure the gif is 256x208 and is less than 1.5 mb)
There ya go! Enjoy your new shiny animated thumbnail!