.wpVideoBoxPreview {
  display:block;
}
.wpVideoBoxPreview button {
  display: block;
  max-width: 400px;
  background: #478707;
  color: #fff;
  border-radius: 8px;
  border: 2px solid #376607;
  padding: 10px 15px;
  text-decoration: none;
  font-size: 1.2em;
}
.wpVideoBox {
  width: auto;
}