This 2 minute video shows you how to check if your camera and/or microphone are having any issues recording. 

This is a great way to rule out whether the problem could be local to your computer. 

Test site: https://www.webrtc-experiment.com/RecordRTC/

Loom doesn't have internal audio recording capabilities yet, but you can track the progress of that feature on the Loom Roadmap

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