I checked the settings again, fps was only set to 25 so I'm now trying 60 for my next vid. The file gets much bigger though so maybe YT will compress it even more... (no change of file size when changing 25fps to 60fps).
I also noted that the Filmora software has a dedicated option for extracting directly to misc platforms including YT. I don't want to upload directly, but I checked the settings for that option and found 720p. In my ordinary routine option I don't find anything regarding "p", so I wonder what that is? I find 7000kbps - is that related?
Edit: I could not see a difference locally (not yet uploaded) between 25fps and 60fps. I guess frames are more essential during game footage than in editing/extracting.