.video {
  max-width: 466px;
  max-height: 360px;
}

.canvas {
  background-color:transparent;
  top: 0;
  left: 0;
  width: 480px;
  height: 360px;
  z-index: 10;
}

.canvas-b {
  padding:0.15em;
  display:inline-block;
  border:none;
  background-color:transparent;
  transition:1s;
}

.canvas-b:hover {
  background-size: 3px 100%, 100% 3px,3px 100%, 100% 3px ;
}