Properly embedding Youtube video into bootstrap 3.0 page

I need to embed a YouTube video into my responsive site but it's not scaling correctly, especially on mobile. It looks fine on desktop and tablets but once you get below a viewport width of 600, the video breaks its container. To view the whole video on mobile you need to pinch out to a point that the rest of the content only fills about 1/2 the screen vertically. Not so good.

I want the text content to be 1/3 wide and the video to be 2/3 wide on desktop and tablets and stacked on mobile with the video and content both 100% of the viewport width. I've tried using width="100%" on the iframe but then the height doesn't scale correctly as you resize and the video either gets stretched or squished.

I also need to do it with CSS only as i'm simply laying my stylesheets over stock bootstrap 3.0.

Here's my code:

 <div class="container">            
            <div class="row">
                <div class="col-sm-4">Content. This is content, it is not meant to be read or understood. Something random goes here, it can be whatever you want, it's just blankish content provided so that it fills up some space, pretty boring huh?</div>
                <div class="col-sm-8">
                   <iframe width="600" height="338" src="http://www.youtube.com/embed/KgMt0dtr4Vc" frameborder="0" allowfullscreen></iframe>
                </div>
 </div>

There is a Bootstrap3 native solution: http://getbootstrap.com/components/#responsive-embed

since Bootstrap 3.2.0!

If you are using Bootstrap < v3.2.0 so look into "responsive-embed.less" file of v3.2.0 - possibly you can use/copy this code in your case (it works for me in v3.1.1).

I know it's late, I have the same issue with an old custom theme, just added to boostrap.css:

.embed-responsive {
  position: relative;
  display: block;
  height: 0;
  padding: 0;
  overflow: hidden;
}
.embed-responsive .embed-responsive-item,
.embed-responsive iframe,
.embed-responsive embed,
.embed-responsive object,
.embed-responsive video {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.embed-responsive-16by9 {
  padding-bottom: 56.25%;
}
.embed-responsive-4by3 {
  padding-bottom: 75%;
}

And for the video:

<div class="embed-responsive embed-responsive-16by9" >
<iframe class="embed-responsive-item"  src="https://www.youtube.com/embed/jVIxe3YLNs8"></iframe>
</div>

Have a think about wrapping the videos inside something which you can make flexible via bootsrap.

The bootstrap is not a magic tool, its just a layout engine. You almost have it in your example.

Just use the grid provided by bootstrap and remove strict sizing's on the iframe. Use the bootstrap class guides for the grid..

For example:

<iframe class="col-lg-2 col-md-6 col-sm-12 col-xs-12">

You will see how the class of the iframe will change then given your resolution.

A Fiddel too : http://jsfiddle.net/RsSAT/

Well it has a simple and easy solution. You can make your video easily to fit for any device and screen size. Here is the HTML and CSS code:

.yt-container {
	position:relative;
	padding-bottom:56.25%;
	padding-top:30px;
	height:0;
	overflow:hidden;
}

.yt-container iframe, .yt-container object, .yt-container embed {
	position:absolute;
	top:0;
	left:0;
	width:100%;
	height:100%;
}

<div class="yt-container">
   <iframe src="https://www.youtube.com/embed/hfQdkBOxXTc" frameborder="0" allowfullscreen></iframe>
</div>

Source: https://www.codespeedy.com/make-youtube-embed-video-responsive-using-css/