Support for loopback audio
Problem: Sound from videos played on slides is not recorded.
Possible solution: Implement a loopback capture like: https://github.com/naudio/NAudio/blob/master/Docs/WasapiLoopbackCapture.md https://www.appsloveworld.com/csharp/100/137/how-to-record-audio-with-wasapiloopbackcapture-when-no-voice-is-coming-out-from-s