YouTube’s “three strikes” policy is their implementation of the DMCA’s “repeat infringers” requirement:
> has adopted and reasonably implemented, and informs subscribers and account holders of the service provider's system or network of, a policy that provides for the *termination* in appropriate circumstances of subscribers and account holders of the service provider's system or network who are *repeat infringers*
> has adopted and reasonably implemented, and informs subscribers and account holders of the service provider's system or network of, a policy that provides for the *termination* in appropriate circumstances of subscribers and account holders of the service provider's system or network who are *repeat infringers*
https://www.aclu.org/documents/text-digital-millennium-copyr...