I looked through these 22 pages and was only really interested in a small amount of the videos; Source Filmmaker animations are mostly not great IMO:
https://twibooru.org/search/index?filter_id=2&q=futa,sex,webm,-anthro

>>10159
>>10160
Yes, the second one:
https://inv.tux.pizza/watch?v=0V5qTNjjbkA
. 00:17:12 - Fluttershy: "In my world, everyone's a pony, and they all eat rainbows and poop butterflies. *Squee*"