During March 2026, NoFear0411 developed Dolby Vision HLS variant support for the jellyfin/jellyfin repository, focusing on enhancing video streaming compatibility and reliability. They implemented a spec-compliant HLS variant for Dolby Vision Profile 5 (HEVC) and Profile 10 (AV1), updating manifest generation in C# to include accurate 'dvh1' and 'dav1' codec strings. This approach ensured that Dolby Vision streams were only served to clients explicitly declaring support, maintaining backward compatibility with older players. Leveraging skills in API and backend development, NoFear0411’s work addressed playback mis-detection issues, improving end-to-end streaming quality and broadening device interoperability for users.