There's an okay video trying to explain Why Atheism Is More Popular Than Ever by TestTube, which is a Discovery Digital Network.
It all goes okay, I suppose, until they explain that people can be atheist or agnostic. At this point, I and many of the commentors to the video died a little inside. It seems like whoever put the video together pretty much assumed that they understood the definitions. I guess they looked them up in a dictionary rather than actually check out how many atheists self-identify and self-define.
|Screen capture from video.|
Note: Removed Harper Collins definition shortly after publishing.