Hello! Recently I've started my journey with KDEnlive. I've made video clip from my GoPro footages in 1080p. Clip looks really good on my computer but once it got uploaded to YT I noticed that quality is getting muuuuch worse. I have tried two rendering settings: Generic (HD for web,mobile devices) MP4-H264AAC and Loossless H264 (libx264+aac) but both looks same after uploading to YT. Anyone could please advise me what settings should I use to keep possible best quality after uploading to YT?

Have you checked the KDE Store? There are many export (aka render) profiles. This one might work for you: https://www.pling.com/p/1840611

It all depends on the power of your computer when rendering video, I recommend setting the standard ones. I run my own blog and prefer to promote it automatically https://viplikes.net/buy-youtube-views-india here I found all the answers about youtube promotion. All my videos became popular in just a month

when you scrolled down to HD did you then open up and pick correct one for you video settings?

YouTube videos have many settings. For example, you can fast forward or slow down video playback. Youtube promotion services are also a great tool.