There are tons of There Will Be Blood videos, parodies and general tomfoolery circulating on the net - some good, some stupid. Here are some of the better ones:
If you're at all into this whole There Will Be Blood/"milkshake" phenomenon, then you have no doubt seen this youtube video, but just in case. Very funny.
This Thomas the Tank Engine version of the trailer isn't quite as funny, but it is original, I'll give it that. My favorite moment occurs at the 1:29 mark, when video editor Deloreonsyk matches Paul Dano saying "get out of here devil" with Thomas the Tank making the "O" face.
And yes, this is a completely serious forum for TWbB fanatics: