Worked on the AdguardTeam/HostlistsRegistry repository to deliver a targeted feature for blocking Spotify video content. Developed a dedicated configuration file using YAML, focusing on ad blocking configuration and network filtering to enhance coverage of video-related domains and CDNs. The approach involved aligning rule formatting with Adguard standards, deduplicating existing rules, and restoring a critical domain entry to ensure comprehensive and maintainable blocking. Through a series of focused commits, the work improved the accuracy and consistency of ad blocking across deployments. This contribution strengthened configuration management practices and supported more reliable filtering for users relying on HostlistsRegistry updates.