I came across a great presentation by Phil Nottingham from a conference called MozCon. Phil discussed some of the flaws behind the current strategy for using video as content, and I thought his advice was applicable to anyone who is creating content for teaching purposes - e.g. Salesforce Admins or consultants who are in charge of training.
Why do we make video?
Sometimes, we just want to create a video because video is impressive. So we approach the video creation process by saying, “I want to make a training video… what should I make it about?”