Тег <source />

Этот тег определяет медиа ресурс для тегов <audio></audio> и <video></video>.

Аргумент	Значение
media	media_query
src	URL
type	MIME-type

index.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
<link href="style.css" rel="stylesheet" />
</head>
<body>
<audio controls="controls" preload="auto">
<source src="audio/a.ogg" type="audio/ogg" />
<source src="audio/a.mp3" type="audio/mp3" />
</audio>
<br />
<br />
<video width="480" height="360" preload="auto" controls="controls">
<source src="video/a.mp4" type="video/mp4" />
<source src="video/a.ogv" type="video/ogg" />
</video>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
<link href="style.css" rel="stylesheet" />
</head>
<body>
<audio controls="controls" preload="auto">
<source src="audio/a.ogg" type="audio/ogg" />
<source src="audio/a.mp3" type="audio/mp3" />
</audio>
<br />
<br />
<video width="480" height="360" preload="auto" controls="controls">
<source src="video/a.mp4" type="video/mp4" />
<source src="video/a.ogv" type="video/ogg" />
</video>
</body>
</html>