I am trying to make a video in which I write on a note app and use screen recording to capture it on an iPad Pro. However, the built-in mic makes the audio quality fairly bad, so I am trying to use a headset connected by Bluetooth. When I record, the audio quality isn't improved at all and I suspect that it's because the recording is still using the built-in mic rather than the connected Bluetooth input. I can't find any settings controlling which input device is used.
I also know the headset works and records higher quality audio since I have been able to use it on a Windows computer. Unfortunately I can't do this work on my Windows computer because that doesn't have good enough screen-writing abilities.
Does anyone know how to make screen recording on iPad which uses a Bluetooth input?