How to find out exact reason for declining advertising on the grounds of trade mark infringement either in the ad or in the tags when ownership of the work has been examined and sanctioned by Utube. How do I stop avoid getting blacklisted?
Have you taken a look at the Adwords trademark policies available here:
Bidding on trademarked keywords is acceptable. Including trademarked terms in ad text or other parts are subject to the policies in the link above.
May I ask what you meant by "examined and sanctioned by youtube". Do you mean you uploaded videos containing trademarked terms? The trademark owner did? I do believe if you closely follow the trademark guidelines in the link above you won't face any issues.
Hope this helps
More info is found here: https://support.google.com/adwords/answer/1704381?hl=en