At one time there was an incitation to make 10 minutes long videos but I don't think it is the case anymore. And while some videos are padded out as an attempt to increase watch time, most of the successful channels don't do it. For example, Lock Picking Lawyer is particularly successful for the niche topic it covers, and the author credit its short and to the point videos as a contributing factor.
Speaking slowly is the norm in education in general. My parents are both teachers, I am not but I received basic training in education too, and "speak slowly" is always among the top advice. Maybe we need to review the rules for video you can control at will.
Speaking slowly is the norm in education in general. My parents are both teachers, I am not but I received basic training in education too, and "speak slowly" is always among the top advice. Maybe we need to review the rules for video you can control at will.