Well usually you can,but for some reason it won't let you do that to My Pictures, Videos, etc.
Maybe if you were to do this: empty out the Videos folder into a temp folder, so that Videos is empty. Empty out another Videos folder from another XP machine, and then transfer that folder from the other one, to the comp you're havin problems with, and overwrite the corrupted My Videos folder. May work, you could give it a shot.