iPhone / iPad Screen Recording
Follow the instructions here for iOS screen recording.
Android Screen Recording
See any of these articles about recording your screen on Android with audio. Ensure you that also record your microphone audio, as it's required on BetaTesting.
Windows Screen Recording
On PC, there are a few options. Ensure that you practice and learn how to record properly before starting an actual test.
Simplest:
Browser plugin on Chrome: There is a simple lightweight screen recorder that works well for anything < 30 minutes. Ensure your browser is up to date first.
Tech Savvy people:
OBS Studio is a high quality Windows app commonly used by streamers / gamers to record their screen. Will be confusing for many people: https://obsproject.com/
Medium tech savvy:
XBox Game Bar: This is a built-in Windows tool: https://nhresearch.lonestar.edu/ScreenCapture/GameBar
Mac Screen Recording
On Mac, you can use Quicktime Player to easily record your screen and audio:
You can also alternatively use a browser plugin. There is a simple lightweight screen recorder that works well for anything < 30 minutes. Ensure your browser is up to date first.