Programa CSS

body{
    margin: 0;
    padding: 0;
    background: black;
}
video{
    width:  ;
    height: ;
    object-fit: cover;
    position: fixed;
    top:10%;
    left: auto;
    transform: translateY(-10%);
    z-index: -1;
}
h1{
    font-family:  "Colonna MT", Arial;
    font-size: 90px;
    font-weight: 400;
    color:aliceblue;
    text-align: center;
    background: midnightblue;
    position: absolute;
    transform: translateX(90%)translateY(-30%);
}
img.lg{
    position:relative;
    float:left;
    transform: translateY(-10%)translateX(-4%);
}
th{
    font-family: sans-serif;
    font-size: 19px;
    font-style: oblique;
    text-align: center, justify;
    transform: translateX(-30%) translateY(710%);
    color:floralwhite;
    background: midnightblue;
}
td.crede{
    position: relative;
    float: right;
    transform: translateX(57%) translateY(90%);
}
audio.uno{
    position:relative;
    transform: translateX(49%)translateY(1290%);
}
audio.dos{
    position: relative;
    transform: translateX(-50%)translateY(1400%);
}
a.btn{
    text-align: center;
    font-weight: bolder;
    font-family: sans-serif;
    font-size: 30px;
    transform: translateY(720%) translateX(450%);
    color: white;
    background: midnightblue;
    position: absolute;

}