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CSS

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HTML 

              
                 <div class="c-mm">
    <details>
      <summary class="c-mm__play"><span data-css-icon="play"><i></i></span></summary>
      <span hidden></span>
    </details>
    <div class="c-mm__inner">
      <figure data-filter="grainy text" class="c-mm__frame" style="--animn:none;--index:0;">
        <figcaption>
          »The Boy Who Loved Comics«
          <div>A Personal Story</div>
        </figcaption>
      </figure>

      <figure data-filter="grainy" class="c-mm__frame" style="--animn:kenburns-bottom-left;--index:1;">
        <img class="c-mm__img" src="https://assets.stoumann.dk/img/silent/mads01.jpg" />
        <figcaption data-caption="bottom left">
          When I was 12 &hellip;
          <div>I drew comics all day long</div>
        </figcaption>
      </figure>

      <figure data-filter="grainy text" class="c-mm__frame" style="--animn:none;--index:2;">
        <figcaption>
          I Met All My Heroes!
          <div>True Legends of Comics!</div>
        </figcaption>
      </figure>

      <figure data-filter="grainy" class="c-mm__frame" style="--animn:kenburns-top;--index:3;">
        <img class="c-mm__img" src="https://assets.stoumann.dk/img/silent/mads02.jpg" />
        <figcaption data-caption="bottom left">
          André Franquin
          <div>Creator of Gaston Lagaffe</div>
        </figcaption>
      </figure>

      <figure data-filter="grainy" class="c-mm__frame" style="--animn:kenburns-bottom-left;--index:4;">
        <img class="c-mm__img" src="https://assets.stoumann.dk/img/silent/mads03.png" />
        <figcaption data-caption="bottom left">
           Carl Barks
          <div>Disney Legend</div>
        </figcaption>
      </figure>

      <figure data-filter="grainy" class="c-mm__frame" style="--animn:kenburns-bottom;--index:5;">
        <img class="c-mm__img" src="https://assets.stoumann.dk/img/silent/mads04.png" />
        <figcaption data-caption="top right">
           Stan »The Man« Lee
          <div>Marvel Legend</div>
        </figcaption>
      </figure>

      <figure data-filter="grainy text" class="c-mm__frame" style="--animn:none;--index:6;">
        <figcaption>
          I Became A Graphic Designer!
          <div>&hellip; And Comic Book Letterer!</div>
        </figcaption>
      </figure>

      <figure data-filter="grainy" class="c-mm__frame" style="--animn:kenburns-top;--index:7;">
        <img class="c-mm__img" src="https://assets.stoumann.dk/img/silent/mads05.jpg" />
        <figcaption data-caption="top left">
           Danish Marvel and DC
           <div>»Beetle Bailey« and others &hellip;</div>
        </figcaption>
      </figure>

      <figure data-filter="grainy" class="c-mm__frame" style="--animn:kenburns-bottom-left;--index:8;">
        <img class="c-mm__img" src="https://assets.stoumann.dk/img/silent/mads06.jpg" />
      </figure>

      <figure data-filter="grainy text" class="c-mm__frame" style="--animn:none;--index:9;">
        <figcaption>
          Today I'm A Front-End Developer!
          <div>(But I still love comics!)</div>
        </figcaption>
      </figure>

    </div>
    <audio src="https://assets.stoumann.dk/audio/onion_capers.mp3" hidden loop></audio>
  </div>

  <p>
    <strong>Music Creadits:</strong> »Onion Capers« Kevin MacLeod (incompetech.com). Licensed under Creative Commons: <a href="http://creativecommons.org/licenses/by/3.0">By Attribution 3.0 License</a>
  </p>

  <svg>
    <filter id="noise">
      <feTurbulence baseFrequency="0.60" xresult="colorNoise" />
      <feColorMatrix in="colorNoise" type="matrix" values=".33 .33 .33 0 0 .33 .33 .33 0 0 .33 .33 .33 0 0 0 0 0 1 0"/>
      <feComposite operator="in" in2="SourceGraphic" result="monoNoise"/>
      <feBlend in="SourceGraphic" in2="monoNoise" mode="multiply" />
    </filter>
  </svg>
!

CSS 

              
                @import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Castoro&family=Smythe&display=swap'); 
 .c-mm {
  --h: 9;
  --w: 16;
  --z: 100; /* z-index begin */
  --animdur: 18000ms; /* 3 times the duration */
  --animtf: ease-out;
  --dist: clamp(0.75rem, 10vw, 1.5rem);
  --slides: 20;
  font-size: 1rem;
  position: relative;
}
.c-mm::before {
  content: '';
  display: block;
  padding-bottom: calc(var(--h) / var(--w) * 100%);
}
[data-caption] {
  --b: var(--dist);
  --l: var(--dist);
  --r: initial;
  --t: initial;

  bottom: var(--b);
  color: rgba(255, 255, 255, 0.95);
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(1rem, 10vw, 4rem);
  left: var(--l);
  line-height: 1;
  position: absolute;
  right: var(--r);
  top: var(--t);
}
[data-caption] div,
[data-filter] div {
  font-family: 'Castoro', serif;
  font-size: 50%;
}

[data-caption*="bottom"] {
  --b: var(--dist);
  --t: auto;
}
[data-caption*="left"] {
  --l: var(--dist);
  --r: auto;
}
[data-caption*="right"] {
  --l: auto;
  --r: var(--dist);
  text-align: right;
}
[data-caption*="top"] {
  --b: auto;
  --t: var(--dist);
}

.c-mm__frame {
  --animps: paused;
  --img-animps: paused;
  --index: 0;
  animation: autoplay var(--animdur) infinite;
  animation-delay: calc((var(--index) * var(--animdur)) / 3);
  animation-play-state: var(--animps);
  box-sizing: border-box;
  height: 100%;
  margin: 0;
  opacity: 0;
  overflow: hidden;
  padding: 0;
  position: absolute;
  top: 0;
  width: 100%;
}

/* Alas, we cannot use var() in nth-selector :-(, so we need code for 3-20 items */
.c-mm__frame:nth-last-child(3):first-child, 
.c-mm__frame:nth-last-child(3):first-child ~ .c-mm__frame {
  animation-duration: var(--animdur);
}
.c-mm__frame:nth-last-child(4):first-child, 
.c-mm__frame:nth-last-child(4):first-child ~ .c-mm__frame {
  animation-duration: calc((4/3) * var(--animdur));
}
.c-mm__frame:nth-last-child(5):first-child, 
.c-mm__frame:nth-last-child(5):first-child ~ .c-mm__frame {
  animation-duration: calc((5/3) * var(--animdur));
}
.c-mm__frame:nth-last-child(6):first-child, 
.c-mm__frame:nth-last-child(6):first-child ~ .c-mm__frame {
  animation-duration: calc((6/3) * var(--animdur));
}
.c-mm__frame:nth-last-child(7):first-child, 
.c-mm__frame:nth-last-child(7):first-child ~ .c-mm__frame {
  animation-duration: calc((7/3) * var(--animdur));
}
.c-mm__frame:nth-last-child(8):first-child, 
.c-mm__frame:nth-last-child(8):first-child ~ .c-mm__frame {
  animation-duration: calc((8/3) * var(--animdur));
}
.c-mm__frame:nth-last-child(9):first-child, 
.c-mm__frame:nth-last-child(9):first-child ~ .c-mm__frame {
  animation-duration: calc((9/3) * var(--animdur));
}
.c-mm__frame:nth-last-child(10):first-child, 
.c-mm__frame:nth-last-child(10):first-child ~ .c-mm__frame {
  animation-duration: calc((10/3) * var(--animdur));
}

.c-mm__img { 
  animation-direction: alternate;
  animation-duration: calc(var(--animdur) / 1.5);
  animation-fill-mode: both;
  animation-iteration-count: infinite;
  animation-name: var(--animn);
  animation-play-state: var(--img-animps);
  animation-timing-function: var(--animtf);
  height: 100%;
  object-fit: cover;
  object-position: var(--x, 50%) var(--y, 50%);
  position: absolute;
  top: 0;
  width: 100%;
  will-change: transform;
}

.c-mm__inner {
  height: 100%;
  position: absolute;
  top: 0;
  width: 100%;
}

.c-mm__play {
  --size: clamp(3rem, 10vw, 4rem);
  align-items: center;
  background: rgba(235,235,235,0.9); 
  box-shadow: 0px 4px 6px -1px rgba(0, 0, 0, 0.1), 0px 2px 4px -1px rgba(0, 0, 0, 0.06);
  border-radius: 50%;
  display: flex;
  height: var(--size);
  justify-content: center;
  position: absolute;
  bottom: var(--dist);
  right: var(--dist);
  user-select: none;
  width: var(--size);
  z-index: calc(var(--z) + var(--slides) + 1); 
}

.c-mm__play:hover {
  background: rgba(255,255,255,0.9); 
}

/* CHECKBOX-HACK STATE */
[name="slideshow"]:checked ~ .c-mm__inner .c-mm__frame {
  --animps: running;
  --img-animps: running;
}
[name="slideshow"]:not(:checked)  ~ .c-mm__inner .c-mm__frame {
  --animps: paused;
  --img-animps: paused !important;
}
[name="slideshow"]:not(:checked) ~ .c-mm__inner .c-mm__frame:first-of-type {
  opacity: 1;
}
[name="slideshow"]:checked + label [data-css-icon*="play"] i::after {
  --cpa: polygon(40% 0%,0% 0%,0% 100%,40% 100%,40% 0%,60% 0%,100% 0%,100% 100%,60% 100%,60% 0%);
}

/* DETAILS STATE */
details[open] ~ .c-mm__inner .c-mm__frame {
  --animps: running;
  --img-animps: running;
}
details:not([open])  ~ .c-mm__inner .c-mm__frame {
  --animps: paused;
  --img-animps: paused !important;
}
details:not([open]) ~ .c-mm__inner .c-mm__frame:first-of-type {
  opacity: 1;
}
details[open] summary [data-css-icon*="play"] i::after {
  --cpa: polygon(40% 0%,0% 0%,0% 100%,40% 100%,40% 0%,60% 0%,100% 0%,100% 100%,60% 100%,60% 0%);
}
summary::marker { display: none; }
summary::-webkit-details-marker { display: none; }

@keyframes autoplay {
  0.1% { --img-animps: running; opacity: 0; z-index: calc(var(--z) + var(--slides)) }
  5% { opacity: 1 }
  50% { opacity: 1 }
  51% { --img-animps: paused }
  100% { opacity: 0; z-index: var(--z) }
}

/* ----------------------------------------------
 * Generated by Animista on 2020-11-25 9:5:10
 * Licensed under FreeBSD License.
 * See http://animista.net/license for more info. 
 * w: http://animista.net, t: @cssanimista
 * ---------------------------------------------- */
@keyframes kenburns-top{0%{transform:scale(1) translateY(0);transform-origin:50% 16%}100%{transform:scale(1.25) translateY(-15px);transform-origin:top}}
@keyframes kenburns-top-right{0%{transform:scale(1) translate(0,0);transform-origin:84% 16%}100%{transform:scale(1.25) translate(20px,-15px);transform-origin:right top}}
@keyframes kenburns-right{0%{transform:scale(1) translate(0,0);transform-origin:84% 50%}100%{transform:scale(1.25) translateX(20px);transform-origin:right}}
@keyframes kenburns-bottom-right{0%{transform:scale(1) translate(0,0);transform-origin:84% 84%}100%{transform:scale(1.25) translate(20px,15px);transform-origin:right bottom}}
@keyframes kenburns-bottom{0%{transform:scale(1) translateY(0);transform-origin:50% 84%}100%{transform:scale(1.25) translateY(15px);transform-origin:bottom}}
@keyframes kenburns-bottom-left{0%{transform:scale(1) translate(0,0);transform-origin:16% 84%}100%{transform:scale(1.25) translate(-20px,15px);transform-origin:left bottom}}
@keyframes kenburns-left{0%{transform:scale(1) translate(0,0);transform-origin:16% 50%}100%{transform:scale(1.25) translate(-20px,15px);transform-origin:left}}
@keyframes kenburns-top-left{0%{transform:scale(1) translate(0,0);transform-origin:16% 16%}100%{transform:scale(1.25) translate(-20px,-15px);transform-origin:top left}}

/* FROM CSS-ICONS-PEN, slightly modified */		
[data-css-icon] {
  --icon-size: 1.5rem;
  --size: 3.75rem;
  --bdrs: 50%;
  --c: currentcolor;
  align-items: center;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
}
[data-css-icon] i {
  align-items: center;
  border-radius: var(--bdrs);
  box-sizing: content-box;
  display: inline-flex;
  height: var(--size);
  justify-content: center;
  position: relative;
  width: var(--size);
}
[data-css-icon] i::after {
  --cpa: none;
  --h: var(--icon-size);
  --w: var(--icon-size);
  background-color: var(--bgcl);
  clip-path: var(--cpa);
  content: "";
  display: inline-block;
  height: var(--h);
  margin: 0;
  width: var(--w);
}
[data-css-icon*="play"] i::after {
  --bgcl: var(--c);
  --cpa: polygon(16% 0%,15% 100%,100% 50%);
}

/* SAFARI HACK */
@media not all and (min-resolution:.001dpcm) { 
  @supports (-webkit-appearance:none) {
    summary [data-css-icon] i {
      right: -2px;
      top: 2px;
    }
    img { filter: grayscale(1); }
  }
}

/* FILTERS */
[data-filter*="text"] figcaption {
  --b: 0;
  --l: 0;
  --r: 0;
  --t: 0;
  animation: shake 1s ease-in-out infinite;
  animation-play-state: var(--animps);
  background-color: #444;
  background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1280 768"><path fill="white" d="M623.6 151.9c-21.2 7-33.6 29-35.3 62.6-.5 9.6-.2 12.4 2 21.5 3 12.2 8.2 27.1 20 57 10.8 27.5 12.7 33.6 17.1 55.5 4.7 23.5 10.6 56.7 10.6 59.3 0 1.2.4 2.3.8 2.6.5.3 2.5-9.3 4.6-21.2 9.4-54.1 11.6-62.8 25.9-101.2 7.7-21 13.9-39.8 16.4-50 2.6-10.7 2.3-32-.5-45.5-4.2-19.8-14.4-34.3-27.9-39.6-8.3-3.2-25.4-3.7-33.7-1zM467.3 244.9c-22.3 7.7-29.7 31.9-15.3 50.1 7 8.8 21.6 16.3 52.5 27 20.4 7 31.8 12.4 44.1 20.6 9.7 6.4 24 19.6 31.6 29.2l5.2 6.5 1.4-3.4c4.8-11.6-5.4-42.1-23.2-69.4-12.1-18.5-28-36.3-42.1-47-7-5.3-21.9-12.8-28.7-14.4-7.1-1.7-19.5-1.3-25.5.8zM776.3 245.4c-14.3 4.7-28.1 14.3-43 29.9-22.8 23.8-42.9 59.5-47.4 84-1.1 6.3-.6 15 1.1 17.7.8 1.3 1.2 1.1 2.7-1 4.1-5.9 13.8-16.3 19.8-21.4 14.4-12.2 24.1-17.4 53.5-29 37.5-14.7 45.4-18.6 54.8-27.1 7.4-6.7 10.7-13.9 10.7-23.5 0-5.8-.5-8.6-2.3-12.1-3.6-7.4-8.7-12.5-16-16.1-6-3-7.6-3.3-16.7-3.5-8.3-.3-11.2.1-17.2 2.1z"/><path fill="white" d="M257 267c-23.8 3.1-44.7 13-57.4 27.3-14.3 15.9-21.2 39.9-18.6 64 3.7 33.8 22.8 56.8 55.5 67 12.5 3.9 21.8 5 36.7 4.4 14.2-.6 21.6-2.1 42.1-8.4 8-2.5 12.1-3.3 12.8-2.6 1.5 1.5-71.7 66.5-103.2 91.5-48.4 38.5-77.1 52.5-114.3 55.8-29.5 2.7-53.8-4.3-69.7-20-12.2-12-16.4-22.3-16.4-40 0-13.2 1.6-19.4 7.2-27.7 3.8-5.6 7.4-8.8 14-12.2 9.6-4.8 27.6-6.7 35.1-3.5 4 1.6 9.2 6.1 9.2 7.8 0 .6-2.3 2.3-5 3.8-6.6 3.7-9.3 8.9-9.4 17.8-.1 10.7 4.4 17 16 22.2 6.6 3 19.6 3.2 26.9.4 11.5-4.4 18.2-11.5 21.7-23 5.9-19.4-4.6-39.2-26.4-49.6-10.5-5.1-19.5-7-32.9-7-39.6 0-68.5 17.2-78.3 46.7-2.4 7.1-2.6 9.2-2.6 23.9 0 14.2.3 16.8 2.4 23 10 29.6 32.4 48.1 66.6 54.9 11.1 2.2 33.6 3 46 1.6 36.7-4.2 70.4-19.3 110.5-49.6 18.1-13.7 25.6-20.1 63-54 16-14.5 31.6-28.5 34.8-31.1 7.9-6.5 8.8-5.3 4.8 6.5-6.7 19.9-8.5 46.1-4.3 62.1 6.2 23.3 21 43.1 40.3 53.9 16.9 9.4 41.2 13.1 63.9 9.6 12-1.8 18.6-3.8 27.8-8.3 15.6-7.7 27.2-19.1 34.3-33.7 6.2-12.8 7-21 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  background-position: bottom center;
  background-repeat: no-repeat;
  background-size: 50%;
  box-sizing: border-box;
  color: #FFF;
  font-family: 'Smythe', serif;
  font-size: clamp(1rem, 9vw, 5rem);
  height: 100%;
  padding: clamp(0.5rem, 10vw, 2rem);
  text-align: center;
  width: 100%;
}

[data-filter*="grainy"] {  
	filter: url(#noise) sepia(1) grayscale(0.6) brightness(0.7) contrast(1.05);
}
[data-filter*="grainy"] figcaption { 
  font-family: 'Smythe', serif;
} 

[data-filter*="grainy"]::after {
  box-shadow: inset 0px 0px 250px #000;
  content: '';
  position: absolute;
  top: 0; left: 0; bottom: 0; right: 0;
}

@keyframes shake {
  10%, 90% {
    transform: translate3d(-1px, -1px, 0);
  }
  
  20%, 80% {
    transform: translate3d(1px, 1px, 0);
  }

  30%, 50%, 70% {
    transform: translate3d(-1px, 1px, 0);
  }

  40%, 60% {
    transform: translate3d(1px, 0, 0);
  }
}

/* DEMO */
body { font-family: system-ui, sans-serif; margin: 0 auto; max-width: 54rem; padding: 1rem }
a, p {  color: silver; font-size: small; }
!

JS 

              
                /* WATCH IN CHROME ! */

const elements = document.querySelectorAll('.c-mm');
elements.forEach(element => {
  const details = element.querySelector('.c-mm details');
  const audio = element.querySelector('.c-mm audio');
  if (details && audio) {
    details.addEventListener('toggle', () => { details.open ? audio.play() : audio.pause(); })
  }
})
!
999px

Console