javascript:(()=>{(()%3D%3E%7Blet%20e%3DArray.from(document.getElementsByTagName(%22video%22))%3Bif(0%3D%3D%3De.length)return%3Blet%20t%3Dwindow.prompt(%22Playback%20rate%3A%22%2C%222%22)%3Bif(!t)return%3Blet%20r%3DNumber.parseFloat(t)%3Bif(!Number.isNaN(r))for(let%20t%20of%20e)t.playbackRate%3Dr%7D)()%3B})()