alt Hacker NewsUh... the repo has literally been taken down by GitHub: https://github.com/rockchip-linux/mpp
Not sure what you're trying to say here. DMCA takedown enforcement is 100% the responsibility of the Online Service Providers per statute. It's the mechanism by which they receive safe harbor from liability for hosting infringing content.
Yes, but Microsoft/Github do not make any determination about the validity of the claim.
Once a valid (from a process perspective) claim is submitted, the provider is required to take the claimed content down for 10 days. From there the counter claim and court processes can go back and forth.