First crop, then use the “Visual Effects” tools “Green Screen” and “Color Adjustment”. You will want to crop the track with your image, match the green screen, and adjust the colour. The idea is to overlay your image on the edited slides so the green screen becomes transparent.Another trick is to leave a short instruction to yourself about what to edit, with several second pauses both before and after, so you can find these easily.If you make a mistake, a good trick is to leave a few seconds pause in the recording when editing you will see where the sound disappears, and where you will have to edit.You can pause the recording rather than stopping and starting a new one.If possible, record in a single take, to simplify editing.You can use a tool like Ink2Go to highlight or draw on any part of the screen.This will make it easier to see details in the video. If you plan to do demos, set the screen resolution to the lowest setting.Close shutters and doors to avoid changes in ambient light.Invest in a decent webcam (eg Logitech Brio).(eg Elgato green screen and Elgato Key Light Air)

Use a green screen with two flood lights on the screen, plus separate lights on your face, if possible.

Camtasia green screen removal