body{
    background-color: black;
    }

#mydiv {
position: absolute;
z-index: 16;
width: 5px;
height: 5px;
}
#mydivheader img{
cursor: move;
z-index: 16;
margin-left: 30px;
margin-top: 90px;
width: 300px;
}

.karaoke{
display: flex;
justify-content: center;

}
.karaoke video{
margin-top: 100px;
width: 1400px;
    }

@media screen and (max-width: 1368px) {
.karaoke video{
width: 900px;
}}
@media screen and (max-width: 480px) {
.karaoke video{
margin-top: 30px;
width: 400px;
}}

@media screen and (max-width: 1368px) {
#mydivheader img{
margin-left: 20px;
margin-top: 50px;
width: 500px;
}}


@media screen and (max-width: 480px) {
#mydivheader img{
margin-left: 30px;
margin-top: 350px;
width: 380px;
}}