Answer
Video Insight does support audio recording from cameras. Depending on the client used, live audio and the exporting of recorded audio may be supported.
Case 1. VI Monitor Plus - Live audio and exporting of audio is supported.
Caseļ¼. VI Web Client - Live audio is not supported. Exporting of audio is supported.
Case 3. VI Mobile App - Live audio and exporting of audio is not supported.
Confirmed at least as of VI version 7.9.x