Embedresponsively.com offers a simple copy/paste solution for responsive containers.

  1. See a video you want to share
  2. Copy the address bar
  3. Visit their site embedresponsively.com
  4. Paste the address
  5. Copy the code their site presents to you

Here’s a screen capture of their website. Check under the graphic below if you wish to see what code they’re pumping out.

embedresponsively's website screen capture

The code that Embed Responsively creates:

.embed-container { 
  position: relative; 
  padding-bottom: 56.25%; 
  height: 0; 
  overflow: hidden; 
  max-width: 100%; 
  height: auto; 
.embed-container iframe, .embed-container object, .embed-container embed { 
  position: absolute; 
  top: 0; 
  left: 0; 
  width: 100%; height: 100%; 

<div class='embed-container'>
  <iframe src='http://www.youtube.com/embed/OQSNhk5ICTI' frameborder='0' allowfullscreen></iframe>