I have no idea how or where it got started but some of the videos are really funny. They all use the same 4 minutes of a movie called "Downfall" and add crazy subtitles.
What fascinates me is the part where they get all the guys to leave the room -- every idea has to have something that sends them away and it's great to see how all of the subtitlers do it. It reminds me a lot of the 48 hour film festival where people are given 48 hours to create a movie about in random style (by drawing the style from a hat) using random props and random bits of dialogue, that everyone in their city has to use. (I love the the 48 hour film festival: http://www.48hourfilm.com/) (The people who Mo made a movie with entered this year and won for best use of props (picture frame (everyone had to use a picture frame)), everyone had to use the line "for crying out loud" somewhere in the script, and they had to use the name Merryweather, this group drew martial arts/stoner film style you can see what they did here: http://www.youtube.com/watch?v=iY4qyisLNhE) Fun!
Anyway.... back to the subject at hand....
The one where Michael Jackson won't be appearing at Hitler's birthday party because he's dead is pretty funny: