Displaying a YouTube video with iframe full width of page

Question

I've put a video in my site using an iframe from YouTube, while the iframe is full width (100%) the video is very small (height) within the frame. How do I make it fit the width of the container?

Code:

<iframe width="100%" height="100%" src="https://www.youtube.com/embed/5m_ZUQTW13I" frameborder="0" allowfullscreen></iframe>

See screenshot

Solution 1

To make a You Tube Video full width and preserve the height (and keep it responsive) you can use the following setup.

.videoWrapper {
  position: relative;
  padding-bottom: 56.25%;
  /* 16:9 */
  padding-top: 25px;
  height: 0;
}

.videoWrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

<div class="videoWrapper">
  <!-- Copy & Pasted from YouTube -->
  <iframe width="560" height="349" src="https://www.youtube.com/embed/n_dZNLr2cME?rel=0&hd=1" frameborder="0" allowfullscreen></iframe>
</div>

Solution 2

The issue is that an iframe and video can't scale like an image, where it gets the proportionally correct height based on the aspect ratio if you just leave the height at the default.

A solution for this is to figure out the native width/height of your video, and do a little math to figure out what the height should be at 100% screen width. Assuming it's 1920x1080, you can do something like this using viewport width (vw). You can reduce the 100vw to whatever fits better, if you don't want it to literally fill the screen.

iframe{
 width: 100vw
 height: calc(100vw/1.77);
}

Comments

[Thomas Orlita]

Thanks! Use height: calc(100vw/1.77777778); to remove extra black line.

[rraallvv]

For some reason the video is not showing up on Google Chrome on Android. Any idea what could be the problem?

[Lajos Mészáros]

Adding source: css-tricks.com/NetMag/FluidWidthVideo/…

[6754534367]

Why the padding-top: 25px; ?

[Francisco Gonzalez Rull]

Use https in the youtube URL when possible. In my case without https the video wouldn't show in Chrome.

[stephenmurdoch]

Use www.youtube-nocookie.com when embedding stuff from them on your site.