FYI, as someone with some math / CS background, I didn't think they went very deep. The only thing on the software side which started to go deep was the one slide of the neural network architecture (the one which looks like a flowchart), which was too small to read. This was a broad architectural outline, nothing more. At this level of generality, it's also really the only possible architecture. There were a few details scattered here and there, but nothing trade-secret-like.
(OK, "some math/CS background" may be an understatement. I only have a bachelor's degree in math, but both my parents are math professors and I've studied all kinds of random math and CS stuff extracurricularly, so I actually have absorbed an awful lot of stuff from the "atmosphere" around me.)