I am particularly interested in the keyframes settings which will make a nice difference. Also, I am concerned that my final file may not have quite the right HDR colour settings for my TV... the colours do sometimes look washed out and not as bright as the 1080p Blu-ray version. I ...
feel free to tweak any other advanced settings in the Video, Audio, and Subtitles tabs---if the video quality isn't high enough for you, for example, you may want an RF of 16 instead of 18 under the "Video" tab. You may also want to change the Framerate from 30 to "...