The code is free and open-sourced so others can use them for learning and use them for their own games. The other assets are public domain (cc0) for others to use as their own, in a way that they want.
I do have one more Music Player UI tutorial to add to the pack, but that may have to wait. I'm still going to add more KKS/Chara Studio assets when I get around to it for others.
There is a new Pre-release for Ren'py that fixes the problem with VP9 encoded webm videos