Well... I used this animation in the game, but not now, only in the next update. Some people mentioned this animation a few weeks or months ago. That's why, I contacted Mykiio and talked about what he thinks about it.
To be honest, he would rather not put his creations in my mod, because as he said:
"I'd rather they not be used for this mod of yours just yet since they are supposed to be added in the next official update and tweaks will possibly be made."
On the other hand, he mentioned that
"there is really nothing I can do if you take and use what is already publicly available, as long as the credit is properly given."
I think it would be a shame not to use something so good in this game, because I personally don't know when the original developers want to update their game (or do something with it).
However, I think it would be nice to mention this author and maybe others in the future if they appear.
That's why I think I will add a SPOILER tag on the main page, which will contain links to the authors whose work was used in this mod. This will be as a kind of thanks for help in improving the mod.