During December 2024, Dusaro focused on enhancing subtitle handling in the jellyfin/jellyfin-vue repository. He delivered a targeted refactor that transitioned subtitle stream indexing from MediaStream indexes to TextTrack indexes, using JavaScript and TypeScript within a Vue.js frontend. This change improved the accuracy of subtitle stream identification across playback systems, reducing the risk of misidentification and supporting future feature development. Dusaro also documented a known external subtitles bug to facilitate cross-team debugging and risk tracking. While no bugs were fixed during this period, the work emphasized architectural improvement and maintainability, demonstrating thoughtful attention to code quality and system robustness.