You're absolutely right; the real credit goes to the PolyDye project. However, it's TeachingTech's video that made PolyDye explode in the last week. Hackaday is just regurgitating what is explained in TT's video. I guess I'm just a bit tired of that page, and what amounts to basically blog spam.

>but he mostly demonstrates tech invented by other people.

In the video it's stated that the PolyDye creator is a 4 year patron(Patreon?) to TeachingTech and it's a collaboration for the demonstration.

AND the linked has changed to the PolyDye github instead of the blog spam.