HTML and CSS Reference
In-Depth Information
Older browsers, such as IE 7 and IE 8, get the YouTube video, which ensures that web page
readers using these older browsers have access to the material. However, if you remove the
Ogg Vorbis and WebM
source
elements and open the page in Firefox, all you'll get is a square
gray box with a lighter gray
X
because Firefox can't find a video source it can play. You won't
get the YouTube video.
The only way to ensure that a video plays in all of the target browsers and other user agents is
to provide all the appropriate video types.
NOTE
Before getting into the codecs, it's important to know that you can use video files with an
audio
element, and audio files with a
video
element. The only difference between the two is the
video
element provides a playing area. All browsers support video files with the
audio
element, but only
Opera and Firefox currently support audio files playing in the
video
element. I strongly recommend
using the appropriate element.
