Seyret is a the most comprehensive video component for Joomla! CMS developed by http://www.joomlaholic.com.

This package includes two XML files for joomfish component for translating Video items and Categories. We only created the categories file the video items file was created by Metodi Darzev from joomlaholic forum (this thread)

For a complete solution you also need to create action buttons for the seyret component. on my project (http://www.jcomm2.com) we needed to handle a multi-lang website and design - Hebrew language require RTL design modification. 
more on the solutios soon on a different post - if you cant wait contact me on email.