This is a techie question for my readership. Suppose I want to record and post on YouTube lectures involving technical materials that can only be taught clearly with the aid of visuals – diagrams or equations and the like. My recent experience convinces me that having Staples make up big boards is too expensive, and my handwriting is now, with advancing age, so crabbed as to be virtually unreadable. What I would like to do is this: Prepare pages of formal materials in advance on my computer, and then deliver a lecture to a camera in such a way that with a click of a mouse, I can switch from the picture of my face [always something of a turn-off J ] to a prepared page of material while my voice can still be heard over the projected formal material. Then, with another click, I return to me talking to the camera. It would of course be a big plus if, as I did this, I could deploy an arrow with a mouse to call attention to something on the screen being projected.
Intuitively, it seems this ought to be possible, but I have not a clue how one would do it. Does anyone know what equipment I would need or how it could be done?