http://www.uesp.net/wiki/Redguard:Installation_guide
I used these instructions to reinstall Redguard. This time the only change was i changed the directory to c:/redguard. But now I can't see the videos in Redguard, what might be the problem?

The videos are on the second disc, which should be in the drive when you play the game. If it still doesn't work, then you need to edit the SYSTEM.INI file and change animation_drive=X:\ where X is your optical disc drive.

And do you maybe know how to manually block attacks in the game?