I just followed these instructions which I found here on another
thread searching for "Your account has been permanently disabled." :

Start here:
http://help.youtube.com/support/youtube/bin/request.py
Select "Account issue" and click "Continue".
Click "Suspended account", then "Learn more about what's happened to
your account".
Answer the questions:
Can you currently log into your account? Answer: No.
When you attempt to log into your account, what error message do you
see? Answer: Your account has been permanently disabled.
Would you like more information about your account suspension?
Answer:
Yes.
Now click on "Contact us" and fill out the form. This should at least
give you an idea as to whether it was for community guidelines
violation or copyright infringement.

The VERY worrying message that I get on the other side when I clicked
the contact button is this:

"Note: In the event that your account is restored, your account
information such as videos and comments will NOT be restored."

I am VERY worried right now. I expect that a sofisticated company as
Google can restore all my videos. I deeply expect that from them.

My ~400 Youtube videos with 2 million yearly views are probably worth
more than $50 thousand dollars in revenues over a combination of the
last three years since I started to upload them and the next couple of
years while they are still relevant to hundreds of thousands of Google
and Youtube users, if only Youtube would display overlay advertising
on them. The largest amount of my viewers are from the USA or the UK,
or from other of those 8 Youtube Partner countries, so I believe
Google should just display advertising and pay Danish content
providers for those views by users in countries that can be monetized.