There is a built-in free video recording tool available in Windows 10 which is part of the Xbox app. You can use this tool to capture videos. This short tutorial shows you how to record videos.
Record a Video in Windows 10 For Free
Step 1. Open the app in Windows 10 you want to record. For an example, Edge browser.
Step 2. Press the Windows icon and G key on the keyboard simultaneously to open the Game Bar Dialog. Select the checkbox which says 'Yes, this is a game'.
Step 3. Press the red icon to start the video recording.
Step 4. When you are done with recording, again press the red icon.
Videos will be saved inside the Video and captures folder respectively.