Zoom netflix videos by using "=" and "-"

Netflix Zoom.user.js

// ==UserScript==
// @name         Netflix Zoom
// @namespace    netflix.tld
// @version      0.3
// @description  try to take over the world! ??? Profit.
// @author       Dave Akers
// @match        https://www.netflix.com/*
// @grant        none
// ==/UserScript==

/*
-# DON'T BE A DICK PUBLIC LICENSE
-> Version 1.1, December 2016
-> Copyright (C) 2016 Dave Akers
-
- Everyone is permitted to copy and distribute verbatim or modified
- copies of this license document.
-
-> DON'T BE A DICK PUBLIC LICENSE
-> TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-
- 1. Do whatever you like with the original work, just don't be a dick.
-     Being a dick includes - but is not limited to - the following instances:
-	 1a. Outright copyright infringement - Don't just copy this and change the name.
-	 1b. Selling the unmodified original with no work done what-so-ever, that's REALLY being a dick.
-	 1c. Modifying the original work to contain hidden harmful content. That would make you a PROPER dick.
-
- 2. If you become rich through modifications, related works/services, or supporting the original work,
- share the love. Only a dick would make loads off this work and not buy the original work's
- creator(s) a pint.
-
- 3. Code is provided with no warranty. Using somebody else's code and bitching when it goes wrong makes
- you a DONKEY dick. Fix the problem yourself. A non-dick would submit the fix back.
-*/

(function() {
    'use strict';
    var newVersion = true;
    var findVideoElement = function() {
        var wrapper = document.getElementsByClassName('video-container')[0];
        if (!wrapper) {
            newVersion = false;
            wrapper = document.getElementsByClassName('player-video-wrapper')[0];
        }
        return wrapper.getElementsByTagName('video')[0];
    };

    var zoomVideo = function(offset) {
        var ele = findVideoElement();
        console.log(ele);
        var newPercent = parseInt(ele.style.height) + offset;
        if (isNaN(newPercent)) newPercent = 100;
        console.log(newPercent);
        if (newPercent < 100) newPercent=100;
        ele.style.position = 'absolute';
        ele.style.height = newPercent + '%';
        ele.style.width = '100%';
        if (!newVersion) {
            ele.style.top = (-((newPercent - 100) / 2)) + '%';
        }
        console.log(ele.style.height);
    };

    document.onkeydown = function(evt) {
        if (evt.keyCode == 187) { // "=" zoomin
            zoomVideo(1);
        }
        if (evt.keyCode == 189) { // "-" zoomout
            zoomVideo(-1);
        }
    };

    console.log('Netflix Zoom loaded.');
})();

Here's a simpler version. Use the keypads + -

var scale = 1;

function zoom(zoomScale)
{
   var video = document.querySelector('video');
   scale += zoomScale;
   
   if (scale < 1) {
     scale = 1;
   } else if (scale > 1.5) {
      scale = 1.5;
   }
   video.style.transform = 'scale(' + scale + ')';
}

window.addEventListener('keydown', function(e) {
	// +
	if (e.keyCode == 107) {
	   zoom(0.02);
	}
	
	// -
	if (e.keyCode == 109) {
	   zoom(-0.02);
	}
});