.mainContainer {
            display: block;
            width: 1024px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .selector {
            width: 150px;
            margin-left: auto;
            margin-right: auto;
        }
        .urlInput {
            width: 60%;
            margin-left: auto;
            margin-right: auto;
            margin-top: 8px;
            margin-bottom: 8px;
        }
        
        .centeredVideo {
            display: block;
            width: 100%;
            height: 576px;
            margin-left: auto;
            margin-right: auto;
            margin-bottom: auto;
        }
        
        .control {
            display: block;
            width: 80%;
            margin-left: auto;
            margin-right: auto;
        }