You can't rely on this video because it's an old one with a user interface which didn't make it into the final version of the game  ;) I think all other features you see there aren't reliable either.

The German version isn't censored. I have blood spatters and puddles... from time to time  ;D when Geralt uses a blade enhancement which buffs bleeding or spends talents in certain abilities of the fighting styles (example. Strong style, steel sword).
The FCR mod has an additional feature which visually makes figthing more gory because you see blood and wounds when an opponent gets injured with a sword.

Aard doesn't work all the time, depends on how advanced the skill is and some opponents have a resistance / immunity to stun effects.