Add a Command-Line Interface (CLI) for AI Agent Integration

Details

Hi! First of all, thank you for creating YoutubeDownloader. It's one of the best YouTube downloaders I've used, and I really appreciate the clean UI and excellent download performance.

Recently, AI coding assistants such as Claude Code, Cursor, and OpenAI Agents have become increasingly popular. These agents can execute local programs and automate workflows, but they work best with applications that provide a command-line interface (CLI).

Would you consider adding a simple CLI to YoutubeDownloader?

For example:

YoutubeDownloader.exe --url "https://youtu.be/xxxxxxxx"

or with more options:

YoutubeDownloader.exe ^
  --url "https://youtu.be/xxxxxxxx" ^
  --quality 1080 ^
  --format mp4 ^
  --output "D:\Videos"

Some additional commands that could be useful:

• --list-formats
• --audio
• --subtitle
• --playlist
• --cookies-from-browser
• --output

This wouldn't just benefit AI agents. It would also make the application much easier to integrate with scripts, automation tools, Windows Task Scheduler, PowerShell, and other developer workflows.

Once a CLI exists, AI agents could automatically invoke YoutubeDownloader to download videos based on natural language requests, while users would still benefit from the excellent download engine and user experience that your application already provides.

I believe this could significantly expand the use cases of YoutubeDownloader without affecting the existing GUI.

Thank you for your time, and thanks again for maintaining such a great project!

Checklist

• I have looked through existing issues to make sure that this feature has not been requested before
• I have provided a descriptive title for this issue
• I am aware that even valid feature requests may be rejected if they do not align with the project's goals
• I have sponsored this project