“Here’s the thing: under the Digital Millennium Copyright Act (DMCA), YouTube is not legally obligated to have a mechanism for policing its content for infringement at all. The site is charged with taking content down when it receives notices to do so, but that’s the extent of it. Nevertheless, YouTube takes an overly active role in policing for copyright infringement, and the technology it employs to do so is flawed – which can end up hurting artists and other content creators who employ copyrighted works legally.”