Don't worry, we all wish Caleb would make new videos. Unfortunately, Caleb, like many of us at this website, does have a life to participate in every now and then. Combined with the fact that these videos are massive, and each one takes days to complete, even for the most active person. It'll be a while before they come back, and you'll see many breaks like this for the remainder of the walkthrough. You're just gonna have to live with it.