If you are getting bored of waiting for all the damn start up videos to finish when you start the game, simply do the following:
Go to your installation folder - for me its:
C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\games\Tom Clancy's Rainbow Six Siege
Then go into the Videos folder and simply rename the Startup folder.
Upon starting the game, you will still get the splash screen and seizure warnings screen, but the others should now be skipped
Go to your installation folder - for me its:
C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\games\Tom Clancy's Rainbow Six Siege
Then go into the Videos folder and simply rename the Startup folder.
Upon starting the game, you will still get the splash screen and seizure warnings screen, but the others should now be skipped