I'm a moderator on wordpress.tv and this post is pretty timely actually. We have recently put out the call for more mods with language skills, and have been lucky to add moderators from Germany, Spain, and Netherlands. Expect more international WordCamps this year on wordpress.tv!

WordPress.tv doesn’t appear to have an easy way to search for videos by language, as the search bar isn’t an effect way of narrowing them down.

Thanks for pointing that out. We've added navigation to the sidebar on the WordCamp videos page to make browsing videos by language a bit easier.