You could potentially farm out the work but that applies to a lot of businesses. :)
I have a technical blog/youtube and most of the "profit" is from having that on my resume.
I'm in the process of looking at blogging tools to do something very similar. I'm kinda worried about having a history though in a few years that shows I only post during interview times :D.
I don't post that often. When I get stuck on a problem because of poor documentation or poor explanations I just make a tut off that. Mostly focused on other things right now though. Making a video is a lot of work. Come up with a project, a script, rewriting your explanation, fill in your gaps in info, voice recording, video editing. It adds up.