Just based on the first lift -
This is much better. Still need to keep your weight back as the bar comes into your hips - you're reaching into a bit too much.
You probably don't feel as strong going under because 1) you're dong something new and focusing on it makes it tough to be as aggressive, 2) you're not strong with that arm pull because you haven't been doing it. Give it some time, and you can also practice tall snatches or high-hang snatches (as high as you can) to help strengthen that pull under (get down into a squat on those though).