This concept will be flushed out in the future and these guys are helping pioneer. They just partnered with wikimedia which is a nice marriage. In theory. But lets see tools tha actually work in the long term.
"Avidemux is a free video editor designed for simple cutting, filtering and encoding tasks. It supports many file types, including AVI, DVD compatible MPEG files, MP4 and ASF, using a variety of codecs."
how to use various open-source tools (such as Kino and Cinelerra) to capture, edit, render and author (either to DVD or the web) your video. You'll definitely need a bit of Linux experience to understand everything, but thankfully the author includes link