Your channel header let's your visitors what your channel is all about and why they should stay and soak it all in.
No need to reinvent the wheel. This template will show you how your channel art will show up on mobile, desktop, and on a TV. This is important to know.
PS: More than 70% of people watch YouTube on mobile devices so making sure it looks good there is vital. The guides (literally...you will see guide lines) show you where your tagline or topic is in jeaopardy of being cut off. I've made it easy to work with the toughest nut first.