Fetch metadata about a YouTube video WITHOUT downloading it. Returns title, channel name, duration, view count, upload date, thumbnail URL, full video description, available video qualities, and the YouTube license type (Standard YouTube License vs Creative Commons).
Use this tool when the user says things like:
- "what is this YouTube video about" / "summarize this video"
- "how long is this video" / "when was this uploaded"
- "who made this video" / "what channel is this from"
- "is this Creative Commons" / "can I reuse this" / "what is the license"
- "what qualities are available for this video"
Do NOT use this tool when:
- The user wants to download, save, rip, extract, or convert the video — use download_video for that.
Free to call — does not count against the user's download quota. Call this before download_video when you need to confirm the video exists, pick the right quality, or check licensing before downloading.