I am doing online demos and webinars and use Kazam to record them. How can I record both the sound from the speakers (videos I play or what the webinar attendees are saying) and microphone (what I say during the webinar) at the same time?
The way I do it currently is by setting up Kazam to record both the monitor of my headset and the builtin speakers by using pavucontrol, but sometimes it does not work, for yet unknown to me reasons (intermittently???) the sound from speakers is not recorded.
I am running on Ubuntu 16.04.7 LTS.
My recording setup: 
My Kazam setup: 
