As for MSC, if they are doing their own videos, and not posting anywhere but on their own site, that's their call. No one can make them charge if they don't want to. Craftsy seems to shoot a lot of theirs in a Denver Studio and host their own.
With the others that are being charged for - it might also be the publishing company that wants its cut.
I've heard about some of this - I own a Google phone, bought from Google. So stuff like this will appear on Android newsletters and forums.