[URSpider94]

No. The maintainers of Popcorn Time might be able to be held accountable, but GitHub is a platform. As long as GitHub follows the take-down process laid out by the DMCA, they have what is called "safe harbor", which means that they are immunized from claims for copyright infringement.

[pickdenis]

Right, I should have added the implied "if they refuse to comply with the notice."

[hnick]

I think it's worth noting that's a US law and the way things are going with GDPR etc, it wouldn't surprise me if another country viewed things differently.