Four years later, and there's still no viable alternative to AAF to create Lottie files. Back then it didn't make much sense from a business perspective, but now that big site builders like Elementor support the format, the case might be different.
My request: please look into it. You would still be the only actual alternative and very likely do a better job too.
Resources
https://lottiefiles.com/
https://elementor.com/widgets/lottie-widget/
