I agree with yvon-robert. Using the automated upload fucntion has many issues, epecially because youtube changes their upload parameters, they try to get you to change your user name, etc.. and software companies who try to offer this type of simple functionality are at a loss because Google/YouTube changes things and really tells no one. The best way to upload to youtube is to export your file into a youtube compatible format, set the resolution that you want to be displayed, open your youtube acount and upload the file.
Simple, effective, precise, works almost every time unless youtube is doing server maintenance or has heavy traffic.