For Apple Devices it's super easy and built in:
https://support.apple.com/en-us/HT207935
For Android it will take another app but here is a quick video to help:
How Do I record My Mobile Device Screen?
Sometimes our support team will ask you to record your screen and send it to us so we can see exactly what you see. (bugs, usage, tips)
Written by Spencer Dennis. Updated over a week ago
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