I just installed simplescreenrecorder (ssr) and it works well. I have one audio query though. Bear in mind it's the first time I've used a screen recorder of any kind. When I record myself commenting on a youtube video with its audio playing, on playing back the ssr mkv file, the audio on youtube is so low I can't hear it. Other audio (ie me speaking) is fine. I've tried fiddling about eg increasing youtube video to max volume but it's still way too low even with laptop audio at max.
Any ideas?
Check out the online manual. There is a section on sound configuration.
https://www.linuxliteos.com/manual/hardware.html#soundIf that doesn't help try changing the backend in the SimpleScreenRecorder's settings to ALSA.
Then you can adjust the alsa sound levels with this command:
alsamixer
It's a command line interface application and you can use the keyboard arrows to set the sound levels.
Left and right to choose an option and up and down to change.
Hope this helps. I don't have experiance with this application.
Perhaps someone familiar with this application would be more helpfull.