How to upload a video to YouTube and ensure it is viewable in WebM
UPDATED March 18, 2013: Due to changes with YouTube, please refer to http://libreplanet.org/wiki/Group:PlayOgg/WebM_recipe for accurate information. The information in this blog post is obsolete and preserved only for historical record.
We've just posted a recipe to follow for converting your videos to the new free WebM format, using VLC. It's hosted on the LibrePlanet wiki at http://libreplanet.org/wiki/Group:PlayOgg/WebM_recipe, with the hope that people will continue to update and improve it over time.
YouTube will make anything uploaded in WebM available for viewing in WebM, for users who have opted in to the HTML5 version of the site, so if you follow this recipe, any videos of yours that get shared there will be viewable by users using all free software!
If you're using YouTube, make sure to choose the HTML5 version at http://www.youtube.com/html5, so you can watch videos without proprietary Flash.
Thanks to FSF summer intern Danny Piccirillo for putting this together.