Having had both, I pretty much agree with the video, it seems pretty fair and I see the same things.
What he doesn't mention is that Nikon does not have a 135mm f/2, or a 100-400mm lens that are in the same ballpark as the Canon lenses. For landscape with the D800 and the 14-24mmG, a landscape shooter will be very happy. However, my D800 was very noisy as ISO got up to 1600, but it took NR very well. However, a low light shooter might not be very happy with it.
The DR at lower iso's in the D800 is simply amazing. Difficult bright sun and shadows just are no problem, while my 5D MK III struggled just as my other Canon bodies struggle. I've learned to live with it, but it was really nice to not have to worry about high contrast scenes.