My comment was based on the reports of several different channels I've followed that have had to deal with spurious Content ID claims. According to those reports, there was no mechanism for further appeal if the Content ID claimant denied the initial appeal. In particular, there was no apparent mechanism to file a DMCA counterclaim and have the content restored despite the Content ID claim. The "DMCA Notice" box in the article's flowchart appears to be a terminal state.
On top of that, according to the article, you can only have so many appeals in progress at any given time, and Content ID claimants can delay responding to such appeals for 30 days.
On top of that, according to the article, you can only have so many appeals in progress at any given time, and Content ID claimants can delay responding to such appeals for 30 days.