There is plethora of these debates ranging from libertarian presidential candidates to libertarian professors and what not. - well you linked on that half way a guy start randomly yelling. Does not seem a serious debate.

I assume for libertarianism Reason.com is the more main stream press outlet in the US. Libertarianism does not have something like the Democratic establishment to represent it. As I said I find Cafe Hayek a good resource. The libertarian party not so much.