This is a good idea, and I've watched that guy on youtube develop his game from the groundup for couple of episodes, but the last thing I want to do after coding all day is to watch somebody else code.. so maybe it would be nice to have some kind of "best of" compilations after people have done these.
Could you want it at a faster speed (maybe 1.5x)? That should cut down your viewing time. Similar to the idea of listening to podcasts at a faster speed.