Direct uploads to YouTube from Premiere Elements are limited (by YouTube) to 10 minutes.
However, if you have an advanced account with YouTube, you can output a longer file from Premiere Elements and manually upload it through your web browser.
Ideally this file will be an MP4 -- but version 9 pre-dates MP4 output from Premiere Elements, so your best option is a WMV file at 1920x1080.
YouTube now allows videos over 15+ minutes to be downloaded, I went through the process. it's the PE9 program that isn't allowing it.??
It's not Premiere Elements. It's YouTube's interface with Premiere Elements.