(Raising a ticket is sometimes a better option than posting in the public forum.)
If this is a class assignment due tomorrow, and you have not already gotten help, I recommend that you publish the video in any way you can such as facebook or as a powerpoint file.
Also if this is a class assignment, you could export your work as a .scribe file and send it to a classmate to publish it for you.
-MIke (videoscribe user)
Have a look at the support article 'Can't Publish to YouTube'.
You'll need to render locally and then manually upload.