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.
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
Browser-based (requires purchase):
Buy a quality browser plugin on Chrome: There are numerous browser-based plugins for Chrome that you can use, but most require a paid plan to record videos that are > 5 minutes and allow exporting / downloading of videos. Good options include: Cursorful and Awesome Screen Recorder
Mac Screen Recording
On Mac, you can use Quicktime Player to easily record your screen and audio:
Or browser-based (requires purchase):
Buy a quality browser plugin on Chrome: There are numerous browser-based plugins for Chrome that you can use, but most require a paid plan to record videos that are > 5 minutes and allow exporting / downloading of videos. Good options include: Cursorful and Awesome Screen Recorder