This is a simple way to embed media into your profile. Basically you can use the code on any webpages.

First, you need to upload your mp3 or video file and get the url. Then place the code below in Now Playing section.

<embed name='MediaPlayer' src='YOUR MEDIA URL HERE'
type='application/x-mplayer2' width='300' height='240' ShowControls='1'
ShowStatusBar='0' autostart="1" loop="1" EnableContextMenu='0' DisplaySize='0'
pluginspage='http://www.microsoft.com/Windows/Downloads/Contents/Products/MediaPlayer/'>
</embed>

Note: Change the value (height, width, etc.) based on your preferences.