Digital Rights Management (DRM) is a set of technologies used to provide an extra layer of content security for video content through encryption and licensing. It helps protect copyrighted content against piracy by blocking or limiting the impact of screen recording, screen sharing, downloading tools, and other content security concerns that can't be completely addressed with traditional security tools like signed URLs, referrer, or user agent restrictions. DRM is commonly used in streaming video services to protect high-value content from unauthorized access and distribution. However, implementing DRM can increase costs and may also introduce friction for viewers, potentially pushing them towards piracy. Therefore, it's essential to find the right balance of security and viewability when using DRM in a video service.