That is with the new app, I do understand also the S5ii(X) will support this in the future
It seems to be even more. In the official streaming at around minute 12 they talk about it. 2 other things aprta from the app.
The S9 has 5GHz Wifi installed. You do not need to be at home to have fast transfer speed, Does the S5ii has this too?
The other is a special open gate "mp4 lite" format, which has smaller file sizes than usual and the transfer of these files is faster thanks to this. I guess this is a firmware thing and could be made also available to the S5ii later on.