Installing the amazing screen recording and streaming software from Open Broadcasting Software, OBS Studio, is easy on Linux Mint.
Run the following commands:
sudo apt install ffmpeg sudo add-apt-repository ppa:obsproject/obs-studio sudo apt-get update && sudo apt-get install obs-studio
Once you've completed those steps you can find OBS Studio in the Linux Mint main menu under the "Sound & Video" section.
This cross platform streaming and screen recording program is excellent and runs perfectly on Linux Mint and other Linux distributions.