Hi Swepty,
First thing I would recommend putting in a upload schedule, e.g new videos every Monday etc. The second thing would be to include a background image rather than just a block blue colour. This could be snapshots of your past videos, these can be layout in numerous ways. You could put them in circles or like I have in diagonal boxes.
If you don't have access to design software like photoshop how about using a template like this one;
www.fotojet.com
It makes it easier and give you a starting point.
I use photoshop to design mine, it took a couple of goes to get it right. I have settled on my current channel artwork for now but I am sure it will develop further.
Hope that helps.