This is fantastic Jay 
I hope we’ll see more authors do this - especially videos!!
Don’t forget to post links to your blog posts and videos here in our Blog Posts and Learning Resources sections (you can use the ‘screencasts’ or ‘video’ tags for the vids and they will get the appropriate icon on our front-page). If you include your book’s tag they will also show in your book portal 
Side note: I actually have an idea about effective teaching which involves a book and videos (as well as another secret ingredient) and I was going to run this by PragProg as an alternative to the ‘learn by doing’ methods currently in vogue - I believe this new method can cover more ground and be just as if not more effective. Perhaps you could do the pilot if they think it is a good idea 
I need to give it a bit more thought before running it by them tho!