* {
  margin: 0;
  padding: 0;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
}

body {
  background: #000;
}

section {
  position: relative;
  width: 100%;
  height: 100vh;
}

section video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  -o-object-fit: cover;
     object-fit: cover;
  -webkit-filter: blur(20px);
          filter: blur(20px);
}

section .box {
  position: absolute;
  top: calc(50% - 200px);
  left: calc(50% - 200px);
  width: 400px;
  height: 400px;
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
}

section .box .sides {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
  -webkit-transform: rotateX(-20deg) rotateY(25deg) translate3d(-75px, -50px, 150px);
          transform: rotateX(-20deg) rotateY(25deg) translate3d(-75px, -50px, 150px);
}

section .box .sides span {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  width: 100%;
  height: 100%;
  border: 1px solid rgba(0, 0, 0, 0.1);
  background: #ccc;
}

section .box .sides span video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  -o-object-fit: cover;
     object-fit: cover;
  -webkit-filter: blur(0);
          filter: blur(0);
}

section .box .sides span:nth-child(1) {
  -webkit-transform: rotateX(0deg) translate3d(0, 0, 200px);
          transform: rotateX(0deg) translate3d(0, 0, 200px);
}

section .box .sides span:nth-child(2) {
  -webkit-transform: rotateY(90deg) translate3d(0, 0, -200px);
          transform: rotateY(90deg) translate3d(0, 0, -200px);
}

section .box .sides span:nth-child(2) video {
  -webkit-transform: rotateY(180deg);
          transform: rotateY(180deg);
}

section .box .sides span:nth-child(3) {
  -webkit-transform: rotateX(90deg) translate3d(0, 0, 200px);
          transform: rotateX(90deg) translate3d(0, 0, 200px);
}