Some other channels I like which probably aren't all exactly in line with your stated interest (e.g. vacuum tube computers), but I believe produce good content in the retro computer (and adjacent) arena:
8 bit show and tell (mostly commodore stuff) Ben Eater CuriousMarc Tech Time Traveler
I've left out some that I like (Cathode Ray Dude comes to mind) which are just too far afield of what I think you are asking for, but are still, in my opinion, good retro computer channels (more or less). Of the ones I mentioned I'm thinking maybe CuriousMarc probably fits best with exactly the kind of thing you are looking for.