Below you can see two versions about the same topic: George Washington's presidency. I spent the most time preparing the script, distilling those 8 years to the most essential elements, and using a thematic approach rather than a pedantic chronology of events.
I first recorded the video on the left -- with a school-supplied Macbook in my son's bedroom (because it was the quietest place in the house that afternoon!). This is my second take. Clearly I need a hair stylist but that's not in the budget. I spent about 20 minutes with iMovie to add the text captions and to trim out some bad takes.
The right-side video was made using Screencast-o-Matic to capture the screen display. What you see is a Word document. I changed the font color for each box to white (starting at the end). Then I clicked the Undo button as I talked through the presentation to show those words. This video was recorded in my car on another afternoon, while waiting for my son at a sports practice. I think the laptop microphone sensitivity was set too high, which explains the crackling audio.
And below you can see the corroborating data. If you're really curious you can see the questions here. 68 students (82% of my class) gave satisfactory answers to every question. 6 students needed to re-attempt at least one question, and 8 other students still need to do the same. That's a well above-average success rate. Best of all, the students' preparation led to a terrific set of class conversations about issues like the Whiskey Rebellion, the French Revolution, presidential power, Alexander Hamilton's monetary policy, and other topics that would probably bore my wife to tears....