Bears repeating, apparently.
Even in a pre-Watch Dogs age, where every dev was a little more loose with this kind of stuff, they were pretty faithful. At least, more faithful than the video you linked portrays it to be.
Regardless though, I don't think there has been a single first party title this generation that has thus far shown anything in the way of gameplay that looks (graphically speaking) much if at all better than what eventually releases, let alone gameplay that is completely and utterly different from what you'll eventually play. Uncharted, Horizon, Bloodborne and GoW have all come and gone, and they look and play exactly the way they were portrayed. So at this point, I think it's alright to give them the benefit of the doubt on this.
That being said, I can't wait for someone to post that Uncharted 3 Chloe Frazer comparison screenshot.