Mostly, I use Camtasia 2020 for the videos.
Sometimes, I use a hardware solution, the Black Magic ATEM Mini Pro ISO. With this device, you have a bunch of buttons to control the camera angle, picture in picture, and so on. It provides a higher quality camera, but in post-production you either (a) have less choices or (b) have to switch to an editing program where I am less familiar with the controls.
Short answer: Camtasia.