body {
 font-family: "Fira Sans","Liberation Sans","Arial",sans-serif;
}
img, video {
 display: block;
 margin: auto;
 padding: 3px;
}
@media screen and (min-device-width: 801px), (min-width: 801px) {
 img, video {
  max-width: 75%;
  max-height: 1000px;
  display: block;
  margin: auto;
  padding: 3px;
 }
 video {
  width: 75%;
 }
}
@media screen and (max-device-width: 800px), (max-width: 800px) {
 img {
  max-width: 100%;
 }
 video {
  width: 100%;
 }
}