/* video background */
#background-video {
  height: 100vh;
  width: 100vw;
  object-fit: cover;
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  z-index: -1;
}
#bottom {
	position: absolute;
    bottom: 0;
    left: 0;
}

.vertical-upright {
         text-orientation: upright;
         writing-mode: vertical-rl; 
}

.vertical-rl {
left: 0;
  writing-mode: vertical-rl;
  &:first-letter {
    color: #ff4136;
    font-weight: bold;
  }
}

View Compiled


/* page content */
h1, h2 {
  color: white;
  font-family: Trebuchet MS;
  font-weight: bold;
//  text-align: center;
}

h1 {
  font-size: 6rem;
//  margin-top: 30vh; 
//  writing-mode: vertical-rl;
}

h2 { font-size: 3rem; }

@media (max-width: 750px) {
    #background-video { display: none; }
    body {
      background: url("assets/shutterstock_1057226431.jpg") no-repeat;
      background-size: cover;
    }
}