Yes, that is correct. Samsung websites states that S10 will have pro mode video. It was removed from S9 to force people to buy S10. This will be the new standard, remove key features from older phones when updates come out and keep them on the new latest phone.
Here is the link for S10 and pro mode video:
https://www.samsung.com/au/support/mobile-devices/galaxy-s10-pro-mode-camera/
The OLD LINK FOR S9 and pro mode video HAS BEEN REMOVED!
