A very highly requested tutorial.
The stocks you will need:
Mint:
http://www.faqs.org/photo-dict/photofiles/list/4455/5916mint_leaves.jpg
Speakers:
http://www.iconspedia.com/uploads/1444989941.png
Brushes:
http://www.smashingmagazine.com/2008/10/22/splatter-and-watercolour-brushes-for-photoshop/
Fractal:
http://greentunic.deviantart.com/art/Fractal-Pack-2-114869027
Template:
http://robertsproductions.net/free-youtube-background-template/comment-page-1#comment-244
It is very important that you save your background as under 256kbs.
YouTube will not accept the background if it is not saved to fit this file constraint.