<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>