Oh no, a pentagram! Because, you know, those locations couldn't just have happened to end up in that arrangement... wait, that pentagram isn't even symmetrical...

It's OK to be worried about what plans Satan has for America, but you can't go pointing to bad things that happen in coincidentally-positioned locations and saying "Satan did this here! And there! And there! It's all his work!" just because they form a particular symbol associated with him. I'm not Catholic, so I won't be listening to the words of some (dead?) saint. Honestly, I think the time spent making this video would have been better spent praying or reaching the lost through more direct and personal means (and no, not door-knocking... only Mormons and Jehovah's Witnesses do that

). I really don't know that a very big percentage of YouTubers will turn to God after seeing something as subjective as this pentagram theory.
As for the Mayans... the problem with various world-ending theories based on Nostradamus or Mayans or whatever is that they are based on the flawed idea that older cultures are more enlightened than we are. This is reinforced by fiction--look at all the stories with a race called "the Ancients" or similar that had magic and/or technology that is thousands of years old but still far more advanced than that of the races that came after them. Not all that long ago it was widely held that the earth was flat, the sun revolved around the earth, and various other things we now know are totally wrong.
The Mayans were an advanced culture, especially considering their total separation from discoveries made on other continents; while they did not quite know what planets
were in the way we do they could easily understand their movement patterns, and they apparently worked their calendars and festivals around them. When the planets finished their grand arc the Mayans treated the next cycle as a new age, and this would have been met with great celebration, not widespread distress. There is
no hard evidence that they believed the end of the current age equalled an Armageddon. This is in stark contrast to Norse mythology, which holds that the end of the age will be met with a series of apocalyptic events called Ragnarök (popularly translated as "twilight of the gods"), which will result in the death of most of the Norse gods and a worldwide flood that wipes out all humanity except for a man and woman who will go on to repopulate the world in the new age.
If someone pinned down a definite date for when Ragnarök was going to happen and started shouting that from the rooftops I would still disagree from a Biblical perspective but at least I could understand the reasoning behind it, because their writings all agree that Ragnarök equals total doom for humanity. I fully expect that 2012 will be another Y2K--fear and confusion over a cataclysmic event that never comes to pass.