or just record it with windows 10 itself.
To record a video, open the Game Bar with Windows Key + G and then click the red record button. A timer will appear at the top-right corner of your game window while it’s recording. To stop recording the window, bring up the Game Bar again and click the red stop button.
You can also start and stop recordings with Windows Key + Alt + R. If you’d like to hide or show the timer, press Windows Key + Alt + T.