The Structural Conflict
As Google's premier AI assistant, Gemini has direct access to YouTube's massive data troves. Yet, if you ask it to download a video, it will refuse. This isn't a technical limitation; it's a legal and structural conflict of interest.
What To Use Instead
While you can't use Gemini, you can use independent tools like Media Server which operates without platform restrictions, allowing you to legally backup content for personal, offline use.