Most likely, your google account does not have a "default channel" to accept the uploads. Google requires your account to have some Youtube channel before you can upload. The only way to create a channel is via the Google Youtube web interface (from a computer!):
- Go to Youtube.com from a computer (this didnt work directly from the iPad for us) click the "Sign in" button.
- Then navigate to http://www.youtube.com/create_channel
- You will be asked "Create a new YouTube channel for your public videos and playlists. Learn more" Click OK and your channel will be created.
- Your uploads from Vinyet should now work.