I love these types of tutorials! They really are useful/helpful for people wanting to learn how you do things specifically so they can emulate that and eventually go off on their own to do similar work. ^^
You did a fantastic job, and I'd love to see more.
One thing I'd recommend you do, before uploading to YouTube, is add "dividers" so people who are trying to find a specific part of your video can simply look for the visual cue that tells them where you are talking about something in specific (for example, having the video recording pause and a black screen appear with white text that says "this next section goes into detail about x/y/z"). Hope that makes sense, though I should think that it would make more sense to do in longer videos and/or videos where you go over multiple concepts.
Anyway, just a thought. =]