The Zend Gdata interfaces contain everything you need to access Google's Data APIs from your PHP 5 WordPress installation.
This plugin adds a "YouTube Media" tab to your video upload options. View and insert your youtube videos without leaving wordpress to find the ID's!
Automaticaly import your YouTube videos into your WordPress blog as posts
This plugin is made for easily embedding videos into a blog post or page.
GoldenGate integrates WordPress with Picasa Web Albums.