style.css

html {
    height: 100vh;
    width: 100vw;
    margin: 0;
    padding: 0;
    overflow: hidden;
    position: relative;
  }
  
body {
    height: 100vh;
    width: 100vw;;
    margin: 0;
    padding: 0;
    display: flex;
    flex-flow: column wrap;
    justify-content: center;
    align-items: center;
}

.video-container {
    margin: 0 auto;
    display: block;
}

video {
    width: 100%;
    height: auto;
    object-fit: cover;
}

#main {
    background-color: #1b1b1b;
}

#vid2 {
    background-color: #1b1b1b;
}

#vid3 {
    background-color: #fd6531;
}
  
nav ul {
    list-style: none;
    padding: 0;
    background-color: #333;
}
  
nav ul li {
    display: inline;
    margin-right: 20px;
}
  
nav ul li a {
    color: white;
    text-decoration: none;
}