1. Installation
1.1. Right click on the desktop and " Open Terminal "
1.2. Install the kazam software.
sudo apt-get install kazam 
2. use
2.1. Open it after installation, let's see that the interface of this software is still very friendly and simple.
2.2. In addition to recording, we can also take screenshots, and also choose to record in full screen, window, or area .
2.3. If you want to record the sound from the computer, you can check the "Sound from speaker" at the bottom and select "capture" to start recording.
2.4. When the recording is finished, you can select "Finish Recording" on the top panel.
2.5. Then choose to save by default in the pop-up window, and click "Continue".
2.6. Select the location, fill in the name and click "Save".
3. Configure the recording format
Open File->References->ScreenCast
Choose the default recording format
references
ubuntu screen recording software - Know almost