http://code.google.com/apis/youtube/overview.html

What are the YouTube APIs and Tools?

The YouTube APIs and Tools open up a full range of YouTube functionality for web pages, software and devices. Users of the API can upload new videos, edit video metadata such as comments and favorites and modify user settings. Your client application can request a list of videos that match specific search criteria, get access to the most popular YouTube videos or retrieve and maintain YouTube user information such as playlists, subscriptions or contacts.

Here are some of the things you can do with the YouTube Data API:

* Create a web front end to let people view videos about specific topics.
* Create a desktop application or plugin that plays videos in a customized environment.
* Add related, dynamic video content to your website or application.
* Customise the Flash player to fit the look and feel of your site, device or application
* Add feeds of videos from each of YouTube’s 18 international domains

Developer’s Guide: Data API Protocol

The YouTube Data API allows applications to perform functions normally executed on the YouTube website. The API enables your application to search for YouTube videos and to retrieve standard video feeds, comments and video responses. In addition, the API lets your application upload videos to YouTube or update existing videos. Your can also retrieve playlists, subscriptions, user profiles and more. Finally, your application can submit authenticated requests to enable users to create playlists, subscriptions, contacts and other account-specific entities.

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o Java
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* Reference Guide
* Migration Guide
* Developer Keys
* Libraries and Code

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YouTube Player Tools

* Player Parameters
* Player APIs
o JavaScript API
o Flash API
* Chromeless Player

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Google Data Protocol

* Overview