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 and cutscenes play extremely slowly - the audio is very choppy and basically 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? This is on an i5 CPU.
Have you tried watching the tutorials from the Main Menu when you start the game? I think those will play fine from the menu.