My machine can handle Deus Ex Human Revolution fine with the resolution turned down a bit from my screen's native resolution. However tutorial clips play extremely slowly - the audio is very choppy and unintelligible. Is there a setting I can change that's likely to improve things, or should I just tab out and look them up on YouTube instead?
Have you tried watching the tutorials from the Main Menu when you start the game? I think those will play fine from the menu.