This page includes three examples of media elements with fallback content:
An HTML <audio> element, with fallback HTML content nested inside it.
An HTML <video> element, with fallback HTML content nested inside it.
Another HTML <video> element, with no fallback content. In this example, the fallback content is provided by Able Player.
If the media has a **poster** attribute, the image identified in the poster is displayed, but is slightly transparent in order
to communicate that something isn't quite right.
To test the fallback in a modern browser, add the data-test-fallback attribute to the <audio> or <video> element.