1. Download the installation package of the win system on the official website, and double-click how to install it according to the wizard:
https://obsproject.com/
2. After opening the software, you can see a plus sign in the lower left corner of the scene, click the plus sign to add the scene "screen recording",
3. You can click the plus sign (+) in "Source", select "Display Capture",
4. Click the settings on the right to set the audio and video to be captured:
5. Then start recording (video and sound) by clicking on the right