HTML5 Embedded Media

media.css

<video poster="images/preview.png" width="1280" height="720" controls="controls" preload="none"> 
  <source src="media/video.mp4" type="video/mp4"></source> 
  <source src="media/video.webm" type="video/webm"></source> 
  <source src="media/video.ogg" type="video/ogg"></source>
</video>

<audio controls="controls" preload="none">
  <source src="music.ogg" type="audio/ogg">
  <source src="music.mp3" type="audio/mpeg">
</audio>