ed() {
    let img = document.getElementById("videoFeed");
    img.src = "/video_feed_{{ camera.Num }}?t=" + new Date().getTime();
}

document.getElementById("fullscreenButton").addEventListener("click", function() {
    let elem = document.documentElement;
    if (!document.fullscreenElement && !document.webkitFullscreenElement) {
        if (elem.requestFullscreen) {
            elem.requestFullscreen();
        } else if (elem.webkitRequestFullscreen) {
            elem.webkitRequestFullscreen();
       