Muddy result with low bitrate delivery

My current problem is this:

The raw material comes from a Gopro Hero 7 Black and has a resolution of 2.7k. I want to make a movie with the resolution 1080. The higher resolution when filming is what I use to take snippets.

If I export the finished movie and limit the bitrate to 10,000 (for Youtube) I get a muddy result. But if I export the movie with high bit rate (Quality for example High) and in a second step encode it with XMedia Recode to 10,000 kb / s, the result is much better.

My question: DR can not export low bit rates with good quality?

That 10,000kbps is only a guideline figure so that uploads are faster. I shoot and edit mp4 1080 50p at 35,000kbps and it gets rendered at that or higher. I then upload videos at that bit-rate. To get around artifacts that are sometimes added when YT does their re-encode, I will often edit HD using a UHD timeline and render that as UHD at 70,000kbps for upload. Though the upload will take some time, I just leave the computer to do its' thing.

H.264 output in Resolve is not great, so using a low bitrate will give you pretty rough results. I recommend you output in high bitrate DNxHR/ProRes, and upload that to YT. It'll take some time to process, but the result is better. As Charles has said, UHD uploads get a better bits per pixel ratio, so if you can wait, it will actually look better that way.

Okay, thank you, Charles and Jack. I will try both ways. Have a nice day.