Can you recover lost audio from QuickTime screen recording?

I recorded a two hour interview on FaceTime using the screen recording feature on QuickTime. Video is great, but no sound. I really don't want to have to re-do the interview if at all possible. Is there a way to recover the audio?

The screen recorder does not "natively" record audio. So if you did not record audio through a microphone (poor quality) or install/use additional software to capture system audio, then there is no audio to "recover" in your recording.