Yep, this is a good one for sure. I would definitely be interested in something like this as well...
Just a compilation of video takes where the camera is in the control room pointed into the live room while tracking is taking place, for one.
Discussions of arrangements while the song is still being crafted, the brainstorming that's involved with that aspect.
The decision process of whether to include or not include certain things into the recording.
Discussion of what could 'make or break' a song.
I could go on and on, great idea!