As is consistent with all the other sites, videos, or whatever generated with regard to this purpose: they are free to all, without restriction. I will not pursue any legal actions. Other than you must respect the fact they are “free to all”/ and you may NOT do anything to restrict the others from what is their gift, just like it was your gift. Which does include changing something a tiny bit; to then claim ownership by that change. The purpose to inform has no other restraint. “save the world if you can”.