DMCA claims go elsewhere, e.g. mailing them a physical letter or going through their separate reporting system for legal violations: https://support.google.com/legal -> https://support.google.com/legal/contact/lr_dmca?product=goo... . And, honestly, I'd still trust physically mailing them over that form - mailed letters start legal time limits for actions in many (many!) cases, online methods rarely have court-tested equivalent protections.