Worked on enhancing code quality and maintainability in the flowplayer/hls.js repository by refactoring the adaptive bitrate logic. Focused on isolating the nextAutoLevel calculation, the developer extracted this logic into a protected deriveNextAutoLevel method within the AbrController class using TypeScript. This approach preserved existing behavior while improving code organization and readability. By decoupling the calculation from its call sites, the changes enabled easier unit testing and set a foundation for future extensions. The work emphasized risk reduction and maintainability, ensuring that future performance improvements or refactors in the adaptive bitrate selection process can be implemented more safely.