merging changes

source/Ox.UI/js/Video/Ox.VideoPreview.js

@@ -36,6 +36,7 @@ Ox.VideoPreview = function(options, self) {
     self.$interface = Ox.Element({
             tooltip: function(event) {
                 //event.offsetX does not work in Firefox
+                // fixme: use layerX then
                 var position = getPosition(event.clientX - that.offset().left);
                 self.$frame.attr({src: self.options.getFrame(position)});
                 return Ox.formatDuration(position, 2);