absolute;
                top: 0vh;
                left: 0vw;
                display: none;  /* Hidden by default */
                z-index: 2;
            }
        </style>
                <script src="scripts/three.min.js"></script>
    </head>
    <template id="video-view">
            <style>
                :host {
                    width: 100vh;
                    height: 100vh;
                }
            </style>
    </template>
    <body>
        <button id="startbutton" onclick="startDemo