Just a few clicks and those annoying videos can be gone.
First thing to do is to find your game content. If you have the game on Steam (and seen as this tutorial is aimed at those who have bought the game on the Humble Bundle I'm taking that as you have) then right click on the game in your library, click properties then go to 'local files' tab then 'browse local files'.
Next open the folder entitled 'media', then 'videos'.
Create a folder on your desktop and call it something you will remember. I called mine 'removed Darksiders vids'.
In the 'videos' folder move over the following videos into the folder created on the desktop:
AMD_Logo_movie
main_menu_intro
start_screen_intro
THQ_Logo1280x720
Vigil_Logo1280x720
They may not delete from the 'videos' folder so make sure to delete them after moving them over.
Move that new file into your Darksiders directory (the one with your .exe launcher in it).
Now when you play the game it will show image of all the producers etc. before showing the press start menu. If you ever want to revert simply move the videos in the folder you created in your directory back into the 'videos' folder.
Enjoy