Whether you're doing a video or simply an email message, you have to take time that could be used for something else. That's the obvious part, and, let's face it, the obvious part needs to be repeated from time to time. Now, let's go on and explore the idea in more detail. Usually, we do take time to communicate instructional information. Without it, nothing happens in organizations of more than person.
Someone has to give instructions to someone else for anything to happen.
Better instructions take more time, a higher opportunity cost. Still, the basic point is that we usually pay the cost for some form of instructional communication. In speaking of contextual information, I'm talking about the background information that helps us make sense of the instructions we receive. Of course, this big-picture information can make the difference between an outstanding organization and a mediocre one. But, in the short term, context is rarely as urgent as instructions, and that means we're less likely to pay this opportunity cost.