Force iframe YouTube video to center fit and full cover the screen in the background using HTML5 CSS3

background, css, html, video, youtube-iframe-api

Solution

For a real full screen solution, this can be achieved like this:

HTML

<div class="video-background">
    <div class="video-foreground">
      <iframe src="https://www.youtube.com/embed/I4agXcHLySs?controls=0&showinfo=0&rel=0&autoplay=1&loop=1&mute=1" frameborder="0" allowfullscreen></iframe>
    </div>
  </div>

CSS

* { box-sizing: border-box; }
.video-background {
  background: #000;
  position: fixed;
  top: 0; right: 0; bottom: 0; left: 0;
  z-index: -99;
}
.video-foreground,
.video-background iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

@media (min-aspect-ratio: 16/9) {
  .video-foreground { height: 300%; top: -100%; }
}
@media (max-aspect-ratio: 16/9) {
  .video-foreground { width: 300%; left: -100%; }
}
@media all and (max-width: 600px) {
.vid-info { width: 50%; padding: .5rem; }
.vid-info h1 { margin-bottom: .2rem; }
}
@media all and (max-width: 500px) {
.vid-info .acronym { display: none; }
}

It is not perfect, e.g. it does not work well with extreme aspect ratios of the container, but is doing a great job in most situations. Here is a working example:

https://codepen.io/hnrchrdl/pen/YzPwjBV

Edit: Check Oliver's answer, he seems to have an improved version of this solution.

Problem

How do you force HTML5 `iframe` YouTube video to center fit, cover the full-screen window background using CSS3 HTML eventually Java? As for example "paypal.it" home page background or "unity3d.com/5" top video, has as iframe youtube video. The `iframe` covers the full screen (zooming) and covers all the width and height when re-size the window. It re-size maintaining the 100% min-width zooming the height or the 100% min-height zooming the width. How is this effect achieve using `iframe` HTML5 and CSS3? Code Example HTML5 ``` <div class="video" style="opacity: 1;"> <iframe src="http://www.youtube.com/embed/AddHereVideoId?autoplay=1&amp;html5=1" frameborder="0" style="height: 720px;"> </iframe> </div> ``` Code CSS3 HTML eventually Java help would be appreciated.

Original source