APPROVED! Your lecture JSON plans look fantastic and have the rich educational content required.
Proceed to Phase 3: Standalone Beamer deck per lecture. 
Create the Beamer LaTeX files in `beamer/lecture-slides/lecture-NN-yt.tex`. 
Please build them unit-by-unit. Stop and report back here as soon as Unit 1 is completely generated and compiled to PDF, so that the QA session and I can independently verify the output before you proceed to Unit 2.