Just did a search on your videos and couldn't find anything regarding multiband compressors.
A 2 part video would be nice with you showing the multiband compression mixing tips and some mastering engineer guest do the mastering with multiband part.
Hear hear! I agree this would be a really useful lesson (or lessonS)
I've seen a couple of things online, but nothing too definitive or in-depth..
Demystify this little critter!