Atheists can't live without God?

While surfing around on YouTube, I found this gem. Apparently atheists can't live without God. I've managed to do pretty well over the last 6 years. His first argument against atheism is that the earth/universe "must have had a cause". Of course there are other, more scientific explanations, but those aren't based in the "God did it" logic--so we should just ignore those.

Sarcasm aside, just because we (a group of mammals) don't fully understand how the universe was created/functions, doesn't mean anything (including that there must be a God). Do Christians actually buy such an argument? Do they actually believe that such an argument is effective against debating atheism?

This guy also claims that the universe must have had a "supernatural cause". Why supernatural? And what does 'supernatural' actually mean? Is it just a fancy word to describe a lack of understanding?  In my opinion, this guy (and people like him) is afraid of reality, and would rather live in an imaginary world. The real universe is very mysterious, and the vast majority of it not understood (we live in almost complete darkness). This ignorance can give birth to curiosity or fear. A person that is afraid of not knowing will pretend to know--but this is only for their sake. If we blindly explain everything as being caused by God, then the mind is no longer bothered by ignorance--it falsely believes that it has an understanding where no understanding actually exists. The mind can't tell the difference between fiction and fact--such things are labels.

This video is fairly long, but I expect the best arguments against atheism are at the beginning, so I didn't bother watching the whole thing. The reality is that atheists do not need God (obviously). God is an idea, and we attach ideas to that idea. It is humans that create ideas about morality, and ideas that are conductive of good mental health--not God. I believe freedom is something we all need on some level, and atheists are much more free than theists.