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PrE was released (and coded), before YouTube introduced the Extended membership. The limit in PrE is based on what was, when it was written.
Publish+Share to the proper YouTube format, then manually upload via your Extended YouTube account.
Now, PrE 12 will probably expand that Duration, but then YouTube will probably offer Extended + Accounts, so one will be back to the manual Publish+Share, and manual upload.
YouTube is a moving target, and Adobe cannot keep up with them.
Thanks for the quick reply Hunt.