Honestly that was some of the coolest stuff I've seen so far in this series. It's potentially spoilery/opiniony though, so I'll talk about that after the break!
Pinkie Pie completely obliterated the 4th wall multiple times in this episode, and the addition of hand-crafted felt animation was an amazing touch to her zanyness.
Cutesypoo Toys is actually Jayson's wife, who does storyboarding and a few other things for FiM. The idea that they would work on the show on their own time, in their basement no less, really shows how much they care for it. I love this team.
Anyway, you can find her Twitter page here!
Also an image from October as pointed out in comments !