To record usability tests in the usability lab we use Camtasia, but we also have a videorecorder.
Camtasia has the right tools for creating professional screen videos without formal training. With Camtasia, you can easily generate effective videos that help you train, teach, sell, and more. To read more click on following link: http://www.techsmith.com/camtasia.html
Camtasia trial version (30 days): http://www.techsmith.com/download/camtasia/
Screencast-o-matic (15 min) http://www.screencast-o-matic.com/
Icecream Screen Recorder: https://icecreamapps.com/Screen-Recorder/
Ezvid Video Maker (both for screen recording and editing): https://www.ezvid.com/download
For macOS (pre-installed): quickTime Player.
For Windows10 (pre-installed): Game Bar (Xbox app). Press the 'Win-key + G' to open the toolbar where you can start the screen recording.
Screen sharing (remote control):