Simon contributed to the mpv-player/mpv repository by implementing Matroska Track Metadata Exposure, focusing on enhancing the handling and machine readability of multimedia track metadata. He exposed explicit flags for original and commentary tracks in accordance with the Matroska specification and relevant RFCs, replacing the previous reliance on free-form track names. This approach improved metadata fidelity and interoperability, supporting more reliable automation and analytics for downstream tools. Simon utilized C programming and Python scripting to deliver this feature, demonstrating a solid understanding of multimedia processing and software development. The work addressed a nuanced metadata challenge, though no bug fixes were recorded.