I had a question about the tone sequence at 16:12, but I did some analysis and came to the conclusion that the pattern is: jiu2 jiu2 jiu2 jiu3 (with the last one almost being an hybrid of 4th (initial drop) and 3rd tone (tail)). Actually, I guess I’m unsure about the last one. Would still be useful to have the team’s comments.
here’s a slowed down version of the tone change pattern that should be useful: https://instaud.io/1cQW