Horus Ruins Christmas
...and even if you're not familiar with all of these popular internet conspiracies explaining away the story of Jesus, the video is so well done that it's funny in it's own right.
From the video's creators:
Hey, did you know that the life of Jesus was stolen from the Egyptian God Horus?
Oh, you know stuff about Horus? Well, I mean it was stolen from Mithras.
Oh, you know stuff about Mithras too? Well, whatever pagan god you've never heard of is the one that the life of Jesus is stolen from.