Hello,
You can also save audio/video with one of the many tools out there:
https://www.ispringsolutions.com/blog/10-best-screen-recording-software-for-windows-free-and-paid
This looks interesting but have not tried it:
https://discourse.processing.org/t/having-multiple-sketches-running-and-mixing-them-in-open-broadcaster-software-obs/39580/3
Please read this:
https://discourse.processing.org/faq#format-your-code
:)