style.css

html {
    height: 100%;
    width: 100%;
    margin:0;
}

#video-container {
    position: relative;
}

video {
    width: 90vw;
    height: 90vh;
    position: fixed;
    top: 50%;
    left: 50%;
    border-radius:5px;
    transform: translate(-50%,-50%);
}

#overlay {    
    padding: 10px;
    cursor: move;
    z-index: 10;
    position: absolute;
    color: white;
    font-family: Arial, sans-serif;
    font-size: 24px;
}

#overlay-text {
    background:#007bff;
    padding: 8px;
    color: white;
    width: calc(25% + 140px);
    font-size: 18px;
    outline: none;
    margin-right: 2px;
    border: none;
    border-top-left-radius: 15px !important;
    border-bottom-left-radius: 15px !important;
    border-radius: 5px;
}

#overlay-text::placeholder {
    color:white
}

#apply-overlay {
    padding: 8px;
    font-size: 18px;
    background-color: #007bff;
    border: none;
    color: white;
    cursor: pointer;
    white-space:nowrap;
    border-top-right-radius: 15px !important;
    border-bottom-right-radius: 15px !important;
    border-radius: 5px;
}

.controls {
    border-radius: 100px;
    z-index: 11;
    display: flex;
    position: fixed;
    background: black;
    padding-left: 10px;
    padding-right: 10px;
    padding-top: 5px;
    padding-bottom: 5px;
    bottom: 20px;
    left: 50%;
    transform: translate(-50%, -50%);
    justify-content: center;
    align-items: center;
    align-content: center;
    flex-wrap: nowrap;
}

.stop {

    border: none;
    background: #f83838;
    border-radius: 15px;
    padding: 8px;
    font-size: 1.25rem;
    white-space:nowrap;
    cursor: pointer;
    margin-left:5px;
}

.start {
    border: none;
    background: #3af85a;
    border-radius: 15px;
    padding: 8px;
    font-size: 1.25rem;
    white-space:nowrap;
    cursor: pointer;
}

.bl {
    background:black;
}

#loader {
    display: none;
    position: fixed;
    margin: -8px;
    z-index:10;
    height: 100vh;
    width: 100vw;
    background-color: #000000e3;
    align-items: center;
    justify-content: center;
    align-content: center;
    flex-wrap: nowrap;
    flex-direction: column;
    color:white;
}
#loader.show {
    display:flex !important;
}
h1 {
    font-family: cursive;
}
.shapes {
   width: 44.8px;
   height: 44.8px;
   color: #474bff;
   background: linear-gradient(currentColor 0 0),
          linear-gradient(currentColor 0 0),
          linear-gradient(currentColor 0 0),
          linear-gradient(currentColor 0 0);
   background-size: 23.4px 23.4px;
   background-repeat: no-repeat;
   animation: shapes-53h9rpmd 1.5s infinite cubic-bezier(0.3,1,0,1);
}

@keyframes shapes-53h9rpmd {
   0% {
      background-position: 0    0,100% 0   ,100% 100%,0 100%;
   }

   33% {
      background-position: 0    0,100% 0   ,100% 100%,0 100%;
      width: 67.2px;
      height: 67.2px;
   }

   66% {
      background-position: 100% 0,100% 100%,0    100%,0 0;
      width: 67.2px;
      height: 67.2px;
   }

   100% {
      background-position: 100% 0,100% 100%,0    100%,0 0;
   }
}