Q&A for How to Unblock Copyright Infringement on YouTube

Normally, it responds by email. You can request response by phone.

Yes, because if you remove the copyrighted song, the claim from the claimant will also be removed, thus you can monetize the video again.

Generally, it would again be automatically blocked and you may be awarded a strike, not to mention potentially sued for copyright infringement. If you're making a profit from it, you can also face criminal charges. You still need to deal with why someone else is claiming to own the copyright to your works.

No, there is no such rule. In the USA, for instance, you could be sued for using a single chord from a famous song if it's recognizable, e.g., the opening 3-guitar chord of "Hard Day's Night", by the Beatles.