YouTube did what it was suppose to do to be protected under Title II of DMCA... the insider neglected to mention that in order to be "protected" YouTube must follow Title II to the letter... which means...

it is up to the account owner to counter-claim...

On receiving a counter-claim YouTube must then go back to the original claimants and advise them to commence court proceedings...

It is here where the accuser tends to get a leg up...

If the claimants don't show proof of court procedings within 14 days YouTube MUST reinstate the account...

If they don't - the account holder can now file action against YouTube for wrongful termination and coercion with the original claimants.

DMCA Title II Safe Harbor for Designated Agents is explicit in its details.