The whole point is that YT is again recompressing it, so the quality of your export needs to be as good as possible but also needs to have a reasonable size for upload. If your export has any artifacts - the YT recompression will make it much worse, so you should avoid it at all cost. And TBH I found the quality vs size balance the best when exporting from Resolve with the best possible codec (DNxHR my case) and recompressing it with Handbrake. I also don't see a point of using 60fps on Youtube. It's much better to upload 1440p/30 than 1080/60 when it comes to codecs and quality.I have been outputting 1080p/60fps in MOV format from Resolve, with quality set to 30,000 KBPS. The output looks good, even on YouTube (IMO). I will try MP4 next time and see what it looks like on YT as well.