The Custom form style shown in the video is:
label{color:#000000!important; display: none;}
.form-control {background: #fff; font-size: 20px; font-weight: normal; border: 1px solid #ccc; border-radius: 6px; height: 81px;}
.form-builder--item {padding: 0px;}
.btn {text-transform: uppercase; font-size:27px; font-weight: bold; height: 80px; box-shadow: rgb(14,141,199) 0px 3px 0px}
.btn:hover {opacity: 0.9;}