The title seems a bit misleading, e.g. one could reverse engineer source code into UML. Perhaps a more appropriate title would be: A Gentle Primer on Code disassembling.
Great work. I worked with RTMP for some time and I recall the pain to reverse-engineer their protocol. One other comment, maybe the title should be more like: "How I improved a slow/inefficient RTMP video streaming service by 20x". Just a thought.