4.2 Release Notes

I’m very happy that Epic Games released Unreal Engine 4.2. I have a few questions:

What is the springarm for?
How do I create driver’s eye view or interior view?
How should I name the parts of the 3D model of a vehicle in 3DS Max? I know that I need the body and four wheels.
What if I want the vehicle’s doors, hood, trunk lid, tailgate, and windows to open and close?
I tried to watch the videos but YouTube’s automatic “closed captioning” isn’t good.