Youtube, Toggle Video Player UI Bookmarklet

javascript:(function(){childs = document.querySelector("#movie_player").children;for%20(i=1;%20i<childs.length;%20i++){if%20(childs[i].style.visibility%20==%20"hidden"){childs[i].style.visibility%20=%20""}else%20{childs[i].style.visibility%20=%20"hidden"}}})()

//the scroll bar can be hidden normally using body.style.overflow="hidden" but in full screen the scroll bar persists and idk what to do. It goes away after a moment anyhow.