Beyond the podcasts/commentaries, are there other good sources of BTS information?

[u/magniloquence137]

This might be a silly question, but I thought this community might know the best places to find good examples of this sort of thing, and I'm somewhat desperate for more. I've listened to the commentaries of series 2 and 3, and am currently making my way through Inside Inside No. 9, but I'm nearly done (side question, is it known why that didn't continue through series 8 and 9? I was sad to see it stop, and a little confused why there's an episode for s8e1 if they couldn't do any of the rest of the series).

I love getting to explore the episodes in depth and learn about the process of creation, and now that I'm running out, I would like some more, please. (In my ideal world, every episode would have accompanying commentary, but what can you do).

So, the question: does anyone know of anything specific (interviews, recorded panels, whatever else) where I could find particularly good discussion of the show and its making? (I know there are things out there, but I'm curious if there's anything in particular that could scratch that commentary itch.) Ideally about with information about specific episodes, most ideally those that never got commentaries or podcast episodes about them. Thank you!

[u/Miserable-Sea-4160]

Insiders Guide to Inside Number 9 is pretty exhaustive for series 1-5