Video Stream Manager is a cross-platform desktop utility built in Python that simplifies downloading and managing video streams and playlists. It provides a CustomTkinter GUI with threaded download workers, pause/resume/cancel controls, progress tracking, subtitle extraction, audio-only export, and browser cookie support for authenticated streams. The app integrates yt-dlp programmatically, uses bundled ffmpeg and Deno runtimes for format merging and JS solver assets, and ships as self-contained PyInstaller builds with bundled CA certificates. Release tooling includes build and smoke-test scripts to verify packaged artifacts across macOS, Linux, and Windows.