What error messages do get?
Are you trying to upload directly from PrE (what version?), or are you doing a Share/Export and then uploading to your YouTube account?
I already have a safed project in PrE9 which I am trying to Share and upload to YouTube. But it does not work. in 'Online/YouiTube' the button 'Presets' does not work (it is inactive).
Please don't start more than one thread with the same question, Kosciellska. It makes it very confusing.
Your question was answered in your other thread.
I'm going to lock this one. Thank you.