Hi, this is new Vegas Pro 11.0 "Failed to render Project for YouTube"
"An error ocurred while creatinf xyz.mp4
The reason for the error could not be determined"
My file is 1920x1080 50 fps (double pal)
w/ 25 fps is the same.
I've read in other threads that Youtube occasionally changes it's upload protocols. Which means that any third-party plug-ins or utilities that upload to Youtube may become unusable if the changes are to great.