Here is a freeze-frame photo of the serve video by no skillz:
1. Although hard to tell from a video, his racquet does in fact get into a dropped position "back scratch" (although it has not gotten to the "extreme" position of a pro).
2. The butt of the racquet is pointing to the ball, and he does in fact "pull" the racquet UP towards the ball.
Not sure who posted this, but although I would agree a second serve with the same speed as a first would be "ideal', it is completely inpractical. No pro has the same serve speed for 1st and 2nd serves. What IS suggetsed is that you have the same swing speed on both 1st and 2nd serves, with the second serve receiving a more "glanicing blow" to impart more spin.
Although No Skillz holds his grip with a continental, I agree with the poster who said he is holding it more like a "hammer grip".