Adding to what I've said above, I think - if I stay with OBS Studio - that I'll record screen-capture or window capture to record my teaching material which is in a browser window, and record audio externally using one of several semi-pro or pro mics and recorders I have.
Using Win 10 on a pretty decent system, I've noticed that the window capture, which does capture the actual window/HTML page I'm working on - which is good - does not record <select> dropdowns when they appear in the browser, which is not particularly helpful. Using the screen capture, I CAN record the dropdowns appearing, which is good, but then I get a load of "junk" windows, including those of OBSS itself, appearing in the video, which I then have to edit out of the final video part which, again, isn't terribly helpful.
Welp, since OBSS is free, I can't complain, can I? One gets what one pays for...