The artwork is almost a perfect copy of the original art post #6147418 so I've tagged it with kokaki_mumose but I find it weird that their name isn't listed in the credits of the song on the YouTube page.

Mix by: よしけん
Animations by: はるてぃむ , Zedd , たける
Main Art by: rurui
Background / Sub Art by: Pompmaker
MV: Beebo
Logo: Spiritsnare

So I'm not 100% confident.

@GabrielWB This is the tweet from the artist rurui. They probably just copied the style exactly.