.video{
    width: 750px;
    height: 422px;
    position: absolute;
    top: 40%;
    left: 50%;
    margin-right: -50%;
    transform: translate(-50%, -50%);
}

.polygonbutton{
    position: absolute;
    top: 75%;
    left: 40%;
    margin-right: -50%;
    transform: translate(-50%, -50%);
}

.chkmbutton{
    position: absolute;
    top: 75%;
    left: 60%;
    margin-right: -50%;
    transform: translate(-50%, -50%);
}

.twitterbutton{
    position: absolute;
    top: 90%;
    left: 50%;
    margin-right: -50%;
    transform: translate(-50%, -50%);
}

.emailus{
    position: absolute;
    top: 95%;
    left: 50%;
    margin-right: -50%;
    transform: translate(-50%, -50%);
}

.checked{
    font-size: xx-large;
    position: absolute;
    top: 10%;
    left: 50%;
    margin-right: -50%;
    transform: translate(-50%, -50%);
    color: lightgreen;
}

body{
    background-color: green;
}