Youtube keyless API to retrieve video information by id [closed]

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I'm looking for a youtube API to retrieve information by id (like l3UPzd1ci1k) which:

• Does not require a sign up to get a 'Developer key'.
• Outputs title, date, and probably comment/description given a video ID which is visible in the URL.
• Preferably uses JSON to output the information.

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The YouTube API doesn't require authentication for read-only queries that don't rely on information about a specific user, so you can use the standard API, e.g. http://gdata.youtube.com/feeds/api/videos/3aICB2mUu2k?v=2&alt=json. See the documentation for details.