video {
    height: 100vh;
    width: 100%;
    margin-top: 15px;    
    object-fit: fill;
    position: relative;
}

@media screen and (max-width: 500px) {
    video {
        width: 100%;        
        height: 100%;
        object-fit: fill;        
        margin-top: 82px;
        position: relative;
    }
  }