data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACYAAAAuCAYAAABEbmvDAAAAmklEQVRYR+3VQQrEIBBEUb3/oZO4aBBJ1L9okPCzyQwppPKmYGo59KqH9ioWo7+MYopRAZp3Y4pRAZpfbex6DmyZuMf5/fedz7TX9C9pLDWWG0u253G9vQwqNxObFUtR6ptnFvsS3pJbbWzrkIyQxaiqYopRAZp3Y4pRAZp3Y4pRAZp3Y4pRAZp3Y4pRAZp3Y4pRAZp3Y78RuwHcUhkvhLE82AAAAABJRU5ErkJggg==
Are you sure you downloaded and uploaded it as a .gif file?
It might also be too big for the gif to work