To use them on here you have to use the gif generator, simply copying and pasting wont give you an animated image. Save whatever gif you're trying to use and then use the "upload video" option to load it. Alternatively you can put in a YouTube video link in the other box. Then there are other options just like with the meme generator to add text and images. If you're cheap like me, you dont have imgflip pro and the total number of text boxes and images will be limited, but you can still do some pretty neat stuff with it. Try it and if you can make a gif I'll walk you through some techniques. Hope this helps! Let me know if you have questions.