#mainContainer {
                                               position: relative;
                                               width: 800px;
                                               height: 450px;
                                    }
 
                                    #videocontent, #adContainer {
                                               position: absolute;
                                               top: 0px;
                                               left: 0px;
                                               width: 800px;
                                               height: 450px;
                                               cursor: pointer;
                                    }
 
                                    #contentElement {
                                               width: 8000px;
                                               height: 450px;
                                               overflow: hidden;
                                    }
 
                                    #playButton {
                                               width: 100px;
                                               height: 100px;
                                               background-image: url('play-button.png');
                                               background-repeat: no-repeat;
                                               background-size: cover;
                                               cursor: pointer;
                                               position: absolute;
                                               top: calc(50% - 50px);
                                               left: calc(50% - 50px);
                                               z-index: 22;
                                    }
                                   
                                    #playButton:hover {                                               background-image: url('play-button_hover.png');

                                    }
                                   
                                    #videocontent:hover + #playButton {
                                               background-image: url('play-button_hover.png');
                                    }
                                   
                                    #videotitle {
                                               font-size: 18px;
                                               font-family: "YouTube Noto",Roboto,Arial,Helvetica,sans-serif;
                                               color: rgb(238,238,238);
                                               position: relative;
                                               z-index: 21;
                                               padding-left: 30px;
                                               padding-top: 15px;
                                    }
                                   
                                    #gradient {                                         
                                               z-index: 20;
                                               position: absolute;
                                               height: 60px;
                                               width: 100%;
                                               background-image: linear-gradient(to bottom, rgba(0,0,0,1), rgba(0,0,0,0));
                                    }