<div class="fullscreen-video-container">

  <video autoplay loop muted>

    <source src="https://www.dropbox.com/scl/fi/eg0c3th4vyjnnz09cwxam/22512-328261507_tiny.mp4?rlkey=sk0uvs93a3uby17qbzdx1c3cx&raw=1" type="video/mp4">

>

  </video>

  
<div class = 'fullscreen-video-content'>
  <h1> Some text</h1>
</div>
</div>

* {

  margin: 0;

  padding: 0;

}

.fullscreen-video-container {

  position: relative;

  height: 100vh; 

  width: 100vw;

  overflow: hidden;
  
  display: flex;

  justify-content: center;

  align-items: center;

}

.fullscreen-video-container video {

  position: absolute;

  width: auto;

  height: auto;

  min-width: 100%;

  min-height: 100%;

  top: 50%;

  left: 50%;

  transform: translate(-50%,-50%);

  z-index : -1;

}

.fullscreen-video-content {

  background-color: rgba(255,255,255,0.8);

  padding: 30px;

  border-radius: 5px;

} 

.fullscreen-video-content h1 {

  font-size: 3rem;

  font-weight: 700;

  margin: 0;

  color: #333;

}