One little publicized thing about Windows 10 is the availability of a screen recorder, hidden among the XBox Game Bar tools. Thanks to this, it becomes practically immediate to create a demo video for the app's gameplay.
Considering that the development structure of the application includes a Windows and an Android version, which use the same codebase, after launching the Xbox Game Bar just run the Windows executable and select the window with SlideFour running and press the WIN+Alt+R keys to start recording.
From this moment on, every action performed on the game is recorded in a video file. When you want to stop recording, press the WIN+G sequence and click on the Stop Recording icon.
Now you can select the video and click on Open destination folder to directly access the created file and upload it to Youtube.