Unless you're unaware, people post all those type of videos on YouTube because
1) they have no life
2) they have no life
3) they want to make money without doing anything.
YouTube accounts can be linked to a google account with pays you. And more and more of these videos about 2012 pop up because guaranteed they will get hits. Most of the 2012 doom and gloom videos have thousands and thousands of hits. While I'm not sure how much money it equates to, they're getting paid anyways and to them, they don't care about anyone else, they just care about making videos and getting views and money. They don't make anti-2012 videos because it doesn't sell and people won't click on them.
Hope this clears things up for future YouTube posts.
Kind Regards.
(account deleted)