function Layout(selector) {
    playback.Layout.call(this);
    this.selector = selector;
    this.prevTitle = this.prevSubtitle = "";
    this.padding = {
        top: 70,
        bottom: 160,
        left: 0,
        right: 0,
    };
    this.containerClass = "container";
}
The smallest bounding box containing this bounding box and another.