This is a Python application for migrating playlists and liked songs from Spotify to YouTube Music. It provides both a command-line interface (CLI) and a graphical user interface (GUI) built with Tkinter. The tool first backs up Spotify data (playlists, liked songs, liked albums) into a local JSON file using a modified version of the spotify-backup script. Then it reads that JSON and uses ytmusicapi to add or like songs on YouTube Music, employing a multi-algorithm search strategy to match tracks. The architecture is monolithic: a single package with CLI entry points defined in pyproject.toml and a GUI module. Key external dependencies are ytmusicapi, tkinter, and the Spotify Web API. The code is well-structured with clear separation of concerns (backend logic, CLI, GUI, backup) and includes retry logic for API rate limits. The search algorithm supports exact matching, extended matching, and fuzzy matching with video fallback, demonstrating thoughtful design for cross-platform music identification.