Company Splash Screen Replacer by EZonTheEyes
Simple .bk2 replacer, changing the several second company logos, autosave, and health warning screens all to black screens. Marginally improves boot times.

Pre-Installation: 
I reccomend backing up your Videos folder before installing in case anything happens, or for easy uninstallation

Installation:
Place the videos folder into your main AC Unity install location (eg, steamlibrary/steamapps/common/Assassin's Creed Unity) and select 'Overwrite existing files' when prompted

Uninstallation:
Replace the videos folder with your backed up vanilla videos folder, or verify your game files