New YouTube API Released into the Wild!
You'll be able to do all the things you could with the old API (search through videos, get user information, and list playlists). On top of that, they've added more flexibility with filtering, querying, and alternative outputs (e.g. if you want output in JSON). Brand new feeds include video responses, full comments list, and related videos.
Additionally, the Google data client libraries are now at your disposal. The Java client library even has YouTube-specific extensions, and you can check out the Java developer guide for sample code and explanations. More documentation in different languages is on the way
This new API also fulfills many of the feature requests you've been asking for,
e.g. you can now filter search results by upload date, view count, and rating as well as relevance. Visit the wiki for a full list of completed requests.
To get a full picture of what's new, read up on the docs at
code.google.com. The reference guide, developers guide, and migration guide are great reads.
But what will happen to the Legacy API?
The old REST/XML-RPC API will continue to work for at least a year - through
August 30th, 2008. After that, its existence is not guaranteed. If your website or app is using the Legacy API, they recommend switching sooner rather than later. The migration guide will help you through the process.
