Worked on enhancing Chromecast device support in the streamyfin/streamyfin repository by refining media transcoding profiles to improve playback reliability. Focused on specifying H.264 video with AAC or MP3 audio for HLS streaming and H.264 video with AAC for HTTP streaming, ensuring compatibility with Chromecast devices. Utilized TypeScript to implement these changes, emphasizing device profile management and media transcoding techniques. The updates addressed playback issues and expanded support for various streaming endpoints, resulting in a smoother user experience. This work demonstrated a targeted approach to codec selection and streaming protocol optimization, contributing to more robust and reliable media delivery.