Acelerador de video para tag <video>e <iframe>

acelerador de video

//<IFRAME>
var playbackRate = 3;
var data = {event: 'command', func: 'setPlaybackRate', args: [playbackRate, true]};
var message = JSON.stringify(data);
$('iframe')[0].contentWindow.postMessage(message, '*');

//<ALL IFRAMES WITHOUT JQUERY>
var playbackRate = 3;
var data = {event: 'command', func: 'setPlaybackRate', args: [playbackRate, true]};
var message = JSON.stringify(data);
var iframes = document.querySelectorAll("iframe");
iframes.forEach(fr => fr.contentWindow.postMessage(message, '*'))


//<VIDEO>
var vid = document.querySelector('video');
vid.playbackRate = 3;

//<ALL VIDEOS>
var vids = document.querySelectorAll('video');
vids.forEach(vid => vid.playbackRate = 3);