They'll have to avoid violating the same policy a second time in a 90-day period too. News 

Youtubers Can Take Courses to Clear Warnings from Their History

YouTube is introducing new measures to assist creators in rectifying their rule-breaking actions. From now on, individuals who receive a warning for breaching community guidelines will have the opportunity to participate in a training course aimed at enhancing their comprehension of YouTube’s regulations and avoiding the uploading of prohibited videos. Upon successful completion of the course and maintaining compliance for 90 days, YouTube will erase the warning from their account. Essentially, this allows them to attend a form of detention to prevent a suspension. If they violate the policy for…

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