I would love doing this -- as long as I felt like I was helping somebody. It's a shame the system can't be set up so that you propose an idea/project, then depending on how many people express interest you decide to proceed or not.
For now you could very well gauge people's interest on the relevant subreddit by asking and then proceed if you feel it's enough. Also keep in mind that people will watch the recorded video way beyond the scheduled time as well and potentially reach thousands of views and therefore be helpful to a lot of people.
I think what I'm going to do is record the first hour or so of setting up a new project today, then post about it on the reddit site, G+, and here.
I'll watch the views. If people are interested, I'll post some more.
What I can't decide on is whether or not to do it live or recorded. This first part I'm going to record -- much more control that way. I would imagine doing this live would involve a lot of looking at me stare blankly at the screen <g>
