.trailer-box {
  background-color: #2b2b2b;
  border: 4px solid #555;
  padding: 10px;
  width: 640px;
  margin: 20px auto;
  box-shadow: 4px 4px 0 #000;
}

.trailer-box video {
  width: 100%;
  height: auto;
  display: block;
}