I've been recently browsing scenes and whatnot and I've noticed that some of them use custom animations in them and I'm wondering how those things where achieved. If somebody could point me to a tutorial or give me a general sense of what is used to animate that would be extremely appreciated. I tried reverse engineering it but it doesn't seem to be working

These are some examples of what I'm talking about
https://illusioncards.booru.org/index.php?page=post&s=view&id=57502
https://illusioncards.booru.org/index.php?page=post&s=view&id=50736
https://illusioncards.booru.org/index.php?page=post&s=view&id=50737
https://illusioncards.booru.org/index.php?page=post&s=view&id=50738
https://illusioncards.booru.org/index.php?page=post&s=view&id=61914

you can watch this video for learn how to do custom animations: https://www.youtube.com/watch?v=uyAPqSi13_8
that tutorial is basically how to use the pistons and how to attach those objects with some body parts with KK_AnimationController plugin.