Hi there! "Author" here - glad to see this picking up. This was a fascinating project to work on and I learned a ton in the process. As it's often the case, I would do a lot of things differently if I were starting from scratch today.
Good stuff. I have a question. How did you align the transcribed interview with the audio?
I use Aeneas[1], a set of tools to do force alignment. I found it in equal measures an amazing and a hard to navigate resource. Took me a while to set up and configure everything to the point that it was usable. But when it works, it works well.