The video quality on that
The video quality on that link isn't great, but shows the process. I think the main point regarding this particular video is that you don't have to wait around while the car updates. Just like plugging it only takes 5 seconds as you walk out of the garage, applying the update is just pressing the button to allow the car to update at 2am (or whatever time you choose) and the car will be updated while you sleep. When you drive away in the morning, you are presented with release notes that explain what the changes and new features are.