Using The width Property

If the width property is set to 100%, the video player will be responsive and scale up and down:

Example

video {
    width: 100%;
    height: auto;
}

Notice that in the example above, the video player can be scaled up to be larger than its original size. A better solution, in many cases, will be to use the max-width property instead.


Using The max-width Property

If the max-width property is set to 100%, the video player will scale down if it has to, but never scale up to be larger than its original size:

Example

video {
    max-width: 100%;
    height: auto;
}

Add a Video to the Example Web Page

We want to add a video in our example web page. The video will be resized to always take up all the available space:

Example

video {
width: 100%;
height: auto;
}