The channel name doesn't matter, once you have your account created simply go to settings then look for "
advanced" and just add your "
channel keywords" then youtube will know what your channel is all about.
Using a keyword as the name of a channel will have a lot of benefit if you're marketing your channel within youtube and google+.
It will have an effect if ever you're going to be joining/creating youtube discussions, commenting, engaging in google+ communities, connecting with youtube and google+ users. That way people will see your keyword and know what you're all about and all you have to do is offer value and be social. Then you'll attract a lot of visitors.
If you'll be using other sources of traffic to promote your channel then the name of the channel doesn't matter that much, just keep it short and catchy so that people can remember it easily.
But this doesn't mean that if you don't have your keyword as your channel name you can't promote it within the youtube and google+ community. A channel name with a keyword will just attract a lot of eyeballs and pull in targeted traffic without you screaming "
check out my channel...". All you have to do is offer lots of value through comments, youtube discussions, using google+ and simply being social.
You can also use a brand name that is catchy with a keyword you're targeting as well. Like "SEO Moz" for instance
(even though it has been changed to only "moz") but when you see something like that you already know they're all about SEO.
Hope that helps