This also are downgraded even in my mixing it up, for some reason when i tried to export it in its original state my editing software stopped at 100 % but did not finalize the project, same if i changed bitrate to 30 mbit.
So in the end i just had to select 1080 / 16 mbit, and as you can see youtube have not been kind to that at all.
I have also experimented with 2 similar cameras and had one record 1080/30 and the other 1080/60 ( higher bitrate ) but really if one camera made a capture so did the other, if there was any plate capture advantage to the 60 FPS camera it was 5% or so.