John, what is more important than the hand position is the ball alignment with your head, thanks to Howie, you can very easily see the ball start out to the right of your head, then swing back to the left of your head then drop back away from your body as your shoulders are level to the floor.
On a positive note, the top video shows your timing and cadence are much better, almost spot on, so you are making progress. You will find that it will be much easier to keep your hand behind the ball if your arm is in proper alignment with your head and your head stays over your right foot the whole way through to the follow through.