html {
  overflow: hidden;
  height: 100%;
}

video {
  width: 700px;
  height: 500px;
}
.live{
  position: absolute;
  border: 5px solid #fff000;
  width: auto;
  height: auto;
  padding: 0;
}
.ctrl{
  position: fixed;
  bottom: 1px;
}