I like the idea of a topic bar on the videos. Only question is, how would you do that on the fly during recording? It seems like this would be something that would have to be done in post since the guests might dive into any topic when answering questions. And having a bar that says Q&A is not going to be that helpful.
Another thing that might help is some sort of text file that goes along with each broadcast that says - (EQS start 12:35 end 15:24) or like ( Import routine start 13:35 end 25:32). One problem I am now having is trying to determine just which twitch broadcast a specific topic was answered on. With over 100 videos, just trying to figure out which video it was on is hard sometimes. If we had a series of text files, you could run a search on them and zero in on the video name and approximate timestamp that a topic was talked about.
Perhaps there is some kind of software available in the world for video libraries. Obviously, CBS Sports must have some sort of cataloging system that allows them to find pretty obscure clips of say the Denver Broncos during a live football broadcast. Maybe something like that could help us.