If you wish too remove the videos that appear when the game starts just go into your game directory then open the startupvids.txt file. Erase everything in the file then save it and close it. You can also set the start up vids to be some of the other videos in the file such as the ending scenes. All you need to do is type: media/(name of the video including the .bik part)
Eg:
Media/altar_leanna.bik

It will then play that video when you start the game before the main screen loads.
Have fun.