test.html

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    <script>window.currentScene = 'Test'</script>
    <script src='dist/app.js'></script>
    <style>
        body {
            margin: 0;
            background: grey;
        }

        #controls {
            color: white;
        }

        #wrap {
            width: 1280px;
            height: 720px;
            padding: 0;
            overflow: hidden;
            border: 2px solid grey;
        }

        #frame {
            width: 1920px;
            height: 1080px;
            border: 0;
            background: white;
        }

        #frame {
            zoom: 0.333;
            transform: scale(0.333);
            transform-origin: 0 0;
        }
    </style>
</head>
<body>
<form action='test.html' method='get' id='controls'>
    Session: <select name='stream' id='stream'></select>
    Scene: <select name='pageSel' id='pageSel'></select>
    Program Point: <select name='index' id='index'></select>
    Countdown: <span id='countdown'></span>
    <input type='submit' value='Reload'>
</form>

<div id="wrap">
    <iframe id="frame"></iframe>
</div>
</body>
</html>