Be warned, the video includes some minor spoilers. You'll see a few previously unrevealed areas and a new boss, as well as examples of some of the aforementioned puzzles. But surely this short video only scratches the surface of what we'll see in the actual game three weeks from now.
To follow along or translate into another language, download this PDF Here's a transcript of the dev diary video.
In case you missed it, you can watch the first developer diary, "Lara Croft and the Temple of Osiris: Four-Player Co-Op Mayhem".
Follow this link for the updated Lara Croft and the Temple of Osiris FAQ.