The width attribute on a <video> tag sets the width of the video player.
The width is specified in pixels -- without the ‘px‘ unit.
A width attribute on a <video> element.
The width attribute overrides the original video width.
<video width="320" height="240" controls>
<source src="/media/movie.mp4" type="video/mp4">
<source src="/media/movie.ogg" type="video/ogg">
</video>
The width attribute sets the width of the video element.
The width is defined in pixels, without the 'px' unit.
The browser will maintain the correct aspect ratio if the height is not set.
To define the width in % or other unit, use the CSS width property.
Tip: Try using the actual dimensions of the video file.
It requires fewer resources to play a video in the actual size.
<video width="pixels">
| Value | Description |
|---|---|
| pixels | A number. Width of the video in pixels (e.g. 400). |
Here is when width support started for each browser:
 Chrome
|
4.0 | Jan 2010 |
 Firefox
|
3.5 | Jun 2009 |
 IE/Edge
|
9.0 | Mar 2011 |
 Opera
|
11.5 | Aug 2011 |
 Safari
|
3.1 | Mar 2008 |
