Galaxy Z Flip's Free-stop mechanism allows you to use your Galaxy Z Flip as if it were a laptop. When folded in half and placed on the flat surface, it will be automatically changed into Flex mode. So, you can use the upper half of the screen to view and bottom half to control. This means new angles to snap a video or photo without even having to use your hand. You can now shoot videos in 16:9 ratios in portrait mode perfect for uploading to YouTube.
Source: Samsung