Learn HTML5 from scratch with examples

The Prerequisite is Browser Version are as follows
Mozilla Firefox > 3.5.x
Google Chrome > 3.0.x
Internet Explorer > 9.X (OS should have vista or Windows 7)

How to check your browser Supports HTML5
Simple Click Here
if you see the player, good , just play it else you can see the text Your Browser does not support the HTML5 update the browser as mentioned above...

<video controls>
<source src='sample1.mp3'>
<source src='sample1.ogg'>
Your Browser does not support the HTML5

Video parent tag has multiple source tag provides support for giving more than one file format of same file,
so that browser will play first supported file format.
Generally all browser supports ogg file format.