I think this is pretty standard now no? I have heard of numerous studies about how attention spans are shortening. Some how we have more technology then our ancestors but we have less time for things then they did.
I do agree with you, the video format are length is good.
However, I would be interested in videos going over changing from these testing/dev environments in the courses to an actual production environment. For instance in M103 we are instructed to use a keyfile for authentication between nodes. However, in the doc it says you should not do this in production, and instead use x509 certs. Which I do not find that simplistic. lol Especially when I am trying to put the replica set in a Docker swarm to containerize them.