This video was about electricity. Steven Grey was the man who invented the closest thing to electricity. Back then he made the very first wooden frame and he lay on the swing revealed inside. He then turned a cylinder on the ground next to him and he turned it letting some gold leaves or feathers underneath him fly if he put his hand out above them.
Why does it have to be gold leaves and not ordinary leaves?
What would have made Steven think about inventing the wooden frame better yet electricity?
I now understand why electricity was invented and how and who invented it.