Lenovo Yoga Laptop Second Camera

I Googled this unsuccessfully, and I really did give it some thought. The question is this: What is the second camera for on the Lenovo Yoga ThinkPad? It has the “regular” camera located in the center above the display, but it has a second camera above the keyboard. It points straight up and, when engaged, it gives a nice view of the ceiling. If I’m missing the obvious, I apologize beforehand.

Does the keyboard fold all the way back? WAG it’s for taking pictures tablet-style.

Um … Ah … did I say something about the “obvious”?
This is just between us, right? :flushed:

Thank you!