I have a suggestion to improve the effectiveness of PS videos.
Many years ago I heard a famous American trial lawyer explaining how he addressed juries -
"First, I tell 'em what I'm goin' to tell 'em. Then I tell 'em. Then I tell 'em what I told 'em."
I think the technique is called 'reinforcement'.
Include an introduction listing what specific points the presenter is trying to teach.
Include a summary at the end, revisiting those points, and identifying the places in the video where they had been illustrated.
What do people think?