I also believe that it is. There is so much data contained within video that it's impossible not to obtain something if it can be presented correctly. The trick with coding videos is grabbing the users attention, not losing them, and showing them the results they can expect. If they're not engaged, they're learning. With so many subsets it can be hard to achieve engagement, People want to learn different things, but everyone needs to learn some things. The most efficient way to learn some things is not necessarily the most efficient way to teach some things.