Want to make high quality recordings of zoom sessions on your mac? iShowU V6 to the rescue!
This video shows two methods: Entire screen, or by choosing 'Applications'.
You need iShowU V6 for this, but you can apply some if the ideas to other apps too (well, apart from the 'applications' idea, I guess).
See:
https://shinywhitebox.com/ishowuv6