回答

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">

<style>
@import url("https://fonts.googleapis.com/css?family=Poppins&display=swap");
* {
  margin: 0;
  padding: 0;
  font-family: "Poppins", sans-serif;
  font-weight: bold;
}

.banner {
  position: absolute;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

.banner video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.banner h2 {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #fff;
  font-size: 30vw;
  text-align: center;
  text-transform: uppercase;
  color: #000;
  line-height: 100vh;
  mix-blend-mode: screen;
}
</style>

</head>
<body translate="no">
<div class="banner">
<video  autoplay loop  src="http://repo.bfw.wiki/bfwrepo/video/5d8449e2482ad.mp4" ></video>
<h2>BFW</h2>
</div>
</body>
</html>