I was referring primarily to slack conversations. Usually when searching for a unfamiliar service or tool, I first do a slack search, then look at a KB/Wiki, then at code etc.

Public slack threads are pretty great since you can follow the decision making process when solving problems. Great slack threads may even include data on what the author tried/didn’t try etc.

I agree with you that video recordings are for the most part useless. Until we find a way to get high quality automatic transcription of videos and add them to a good search index, they will have limited use.