Well the problem of recording decent videos persists. There is the problem of my voice being terrible and intermittent, and then the problem of editing the video recording afterwards.
I have spent a lot of time looking into various options including text to voice conversion. That is still an option but I need to do more work on that.
I have resurrected an old version of Camtasia on my old desktop and used that eventually allowed me to zoom in easily and add annotations. It is an improvement.
So I have finally uploaded the letterhead lesson as the video is nearly acceptable, all things considered.