getVideos: function (srcDoc) {
  if (!srcDoc) {
    srcDoc = document;
    window.onkeydown = function (event) {
      var e = event || window.event;
      ap_ext_space.keyDn(e);
    };
  };
  var els = srcDoc.getElementsByTagName('video');
  for (var i = 0; i < els.length; i++) {
    els[i].addEventListener("seeked", function () {ap_ext_space.zoomw(); console.log('seeked'); }, true);
    els[i].addEventListener("abort", function () {ap_ext_space.zoomw(); console.log('abort'); }, true);
    els[i].addEventListener("pause", function () {ap_ext_space.zoomw(); console.log('pause'); }, true);
    els[i].addEventListener("play", function () {ap_ext_space.zoomw(); console.log('play'); }, true);
    els[i].addEventListener("playing", function () {ap_ext_space.zoomw(); console.log('playing'); }, true);
    els[i].addEventListener("seeked", function () {ap_ext_space.zoomw(); console.log('seeked'); }, true);
    ap_ext_space.videos.push(els[i]);
    ap_ext_space.menu(els[i], srcDoc);
  };
  console.log('all videos:', ap_ext_space.videos);
  var ifrs = srcDoc.getElementsByTagName("iframe");
  console.log('iframes:', ifrs);
  var ifr;
  for (var i = 0; i < ifrs.length; i++) {
    ifr = ifrs[i];
    try {
      var innerDoc = (ifr.contentDocument || ifr.contentWindow.document);
      var innerWindow = (ifr.contentWindow || ifr);
      innerWindow.onkeydown = function (event) {
        var e = event || window.event;
        ap_ext_space.keyDn(e);
      };
      ap_ext_space.getVideos(innerDoc);
    } catch (err) {
      console.log('err', err);
    };
  };
},

menu: function(videoEl, doc) {
  //ищем все div родительского к video элемента
  //тем самым определяем, не добавлено ли уже экранное меню (флаг menuInside)
  var els = videoEl.parentNode.getElementsByTagName('div');
  var menuInside = false;
  for (var j = 0; j < els.length; j++) {
    if (els[j].id == 'ap_ext_space_container') {
      menuInside = true;
      ap_ext_space.menus.push(els[j]);
    };
  };
  if (menuInside == false) {
    //создадим элемент экранного меню
    var div = doc.createElement('div');
    div.innerHTML = ap_ext_space.html();
    videoEl.parentNode.appendChild(div);
    div.style.width = '520px';
    div.style.height = '410px';
    div.style.display = 'block';
    div.style.position = 'absolute';
    div.id = 'ap_ext_space_container';
    var url = "url('" + ap_ext_space.imgURL + "')";
    div.style.backgroundImage = url;
    div.style.opacity = 0.95;
    ap_ext_space.menus.push(div);
    //привяжем к нему обработчики
    div.addEventListener("dblclick", function(e) {
      e.preventDefault();
      e.stopPropagation();
    }, true);
    div.addEventListener("mouseover", function(e) {
      e.preventDefault();
      e.stopPropagation();
      var elem, evt = e ? e : event;
      if (evt.srcElement) {
        elem = evt.srcElement;
      } else if (evt.target) {
        elem = evt.target;
      };
      //позиции экранных кнопок для наведения мышью
      var pos = {
        ap_ext_space_num7: [520 + 134, 82],
        ap_ext_space_num8: [520 + 134 + 90, 82],
        ap_ext_space_num9: [520 + 134 + 90 + 90, 82],
        ap_ext_space_num4: [520 + 134, 82 + 90],
        ap_ext_space_num5: [520 + 134 + 90, 82 + 90],
        ap_ext_space_num6: [520 + 134 + 90 + 90, 82 + 90],
        ap_ext_space_num1: [520 + 134, 82 + 90 + 90],
        ap_ext_space_num2: [520 + 134 + 90, 82 + 90 + 90],
        ap_ext_space_num3: [520 + 134 + 90 + 90, 82 + 90 + 90]
      };
      var key, el;
      for (var j = 1; j < 10; j++) {
        key = 'ap_ext_space_num' + j;
        if (elem.id == key) {
          elem.style.backgroundImage = "url('" + ap_ext_space.imgURL + "')";
          elem.style.backgroundPosition = -pos[key][0] + 'px ' + -pos[key][1] + 'px';
        };
      };
    }, true);
    div.addEventListener("mouseout", function(e) {
      e.preventDefault();
      e.stopPropagation();
      var elem, evt = e ? e : event;
      if (evt.srcElement) {
        elem = evt.srcElement;
      } else if (evt.target) {
        elem = evt.target;
      };
      var key, el;
      for (var j = 1; j < 10; j++) {
        key = 'ap_ext_space_num' + j;
        if (elem.id == key) {
          elem.style.backgroundImage = "none";
        };
      };
    }, true);
    div.addEventListener("click", function(e) {
      e.preventDefault();
      e.stopPropagation();
      var elem, evt = e ? e : event;
      if (evt.srcElement) {
        elem = evt.srcElement;
      } else if (evt.target) {
        elem = evt.target;
      };
      ap_ext_space.clickHandler(elem);
    }, true);
    div.addEventListener("touchstart", function(e) {
      e.preventDefault();
      e.stopPropagation();
      var elem, evt = e ? e : event;
      if (evt.srcElement) {
        elem = evt.srcElement;
      } else if (evt.target) {
        elem = evt.target;
      };
      ap_ext_space.clickHandler(elem);
    }, true);
    div.addEventListener("touchend", function(e) {
      e.preventDefault();
    }, true);
    div.addEventListener("touchmove", function(e) {
      e.preventDefault();
    }, true);
    //зададим позицию меню на экране (по центру)
    ap_ext_space.menuPos();
  };
  console.log('all menus:', ap_ext_space.menus);
},

menuPos: function() {
  if (ap_ext_space.isFullScreen()) {
    var sc = ap_ext_space.scale;
    var iw = window.innerWidth,
      ih = window.innerHeight;
    var w = iw * sc;
    var h = w / 16 * 9;
    for (var i = 0; i < ap_ext_space.menus.length; i++) {
      ap_ext_space.menus[i].style.marginLeft = (iw - 520) / 2 + 'px';
      ap_ext_space.menus[i].style.marginTop = (-h - 410) / 2 + 'px';
    };
  } else {
    ap_ext_space.scale = 1;
    for (var i = 0; i < ap_ext_space.menus.length; i++) {
      ap_ext_space.menus[i].style.marginLeft = '0px';
      ap_ext_space.menus[i].style.marginTop = '0px';
    };
  };
},
isFullScreen: function() {
  return !!(document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement);
},

var sc = ap_ext_space.scale;
var iw = window.innerWidth,
  ih = window.innerHeight;
var w = iw * sc;
var h = w / 16 * 9;
for (var i = 0; i < ap_ext_space.videos.length; i++) {
  el = ap_ext_space.videos[i];
  el.style.position = 'initial';
  el.style.width = (w) + 'px';
  el.style.height = (h) + 'px';
  el.style.marginLeft = -(w - iw) / 2 + 'px';
  el.style.marginTop = -(h - ih) / 2 + 'px';
  el.style.transform = 'scaleX(' + ap_ext_space.scalew + ') scaleY(' + ap_ext_space.scaleh + ')';
};

var codeString = ap_ext_space_f.toString() + '; ap_ext_space_f(); ap_ext_space.init()';
chrome.tabs.executeScript({
  code: codeString
});
function ap_ext_space_f() {
  ap_ext_space = {
    init: function() {
      //...
    },
    //...
  };
};