Move your mouse over the video camera icon on the bottom-right of VirtualBox status bar, it will show the destination (on host os) of the recorded video.
- Right click on the video camera icon, select Video Capture to start recording.
- The icon will change to a rolling film.
- Right click on the rolling film icon, select Video Capture again to stop recording.
Alternatively, you can click View of VirtualBox top menu bar, and select Video Capture to start recording. Then click View and select Video Capture again to stop recording.