iam for Portugal and already post a problem when i take photos the image is worst than my s9+ and is incompreeensive this ... the s10+ is not a cheap phone to come with problems like this... with this i want to say that if exist problems in photos may have also problems in video. i receive an update yesterday that mentioned improvements in camera i will see..
I am for Portugal too and I have the same problem. My last phone before S10 was S5 and of course it didn't recorded well at night but even at the day it was less noisy than the S10 is. The stabilization improved a lot but the videos are more grainy I don't know if is about the compression or if is about the lens but for a phone at this price I think is a bit unacceptable and Samsung should fix it.
The hardware is sufficient, and cameras processing isnt up to par.
Just a little more firmware improvement is needed to remove noise and grainy images.
Thats my take.