It does not look exactly like the teaser, but all the techniques are explained. The main difference I see is the background where I think some cloud texture and/or volumetric lighting has been added and a different camera angle was chosen. If you re-watch the lessons, these parts might be most interesting to change the look of your final render:
Compose image over background: https://cgcookie.com/lesson/rendering-presentation
Change the shape of the chest with a lattice modifier for appeal (first half of the video on the coin simulation): https://cgcookie.com/lesson/dropping-coins-with-rigid-body-physics
