.video-container {
  position: relative;
  display: inline-block;
  border: solid 5px transparent;
  transition: border-color 0.6s ease-in-out;
}
.video-container.danger {
  border: solid 5px red;
}
.video-container video {
}
.video-container #canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
.button-wrapper{
  width:400px;
  text-align: center;
  margin: auto;
}