In order to record audio for your video lesson, use of the microphone in your computer must be enabled. If you have the microphone blocked by default and need to enable it, follow the relevant link for the browser you use.
Internet Explorer: https://content001.bet365.com.au/help/docs/FAQ/English/InternetExplorerFAQ.pdf
Microsoft Edge: https://privacy.microsoft.com/en-us/windows-10-camera-and-privacy
If you're still having trouble enabling your microphone, contact firstname.lastname@example.org and we'll do our best to help!