[iRoNBiLL]

Well after a little personal learning experience of my own, I've discovered what SVN is... here is the link to XBMC.org's definition for your reading entertainment. Most people basically refer to it as the official XBMC scripts and plugins archive of files. :
http://xbmc.org/development/svn/

SVN means subversion. "It's a tool used by many software developers to manage changes within their source code tree. SVN provides the means to store not only the current version of a piece of source code, but a record of all changes (and who made those changes) that have occurred to that source code."

Here is the web based application for accessing the XBMC Repository:
http://trac.xbmc.org/browser

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As for the "No Video Streaming" issue, it seems like it's not only happening in the Navi-X script, but your YouTube plugin as well... think back to when was the last time it worked, when you discovered it stopped working and what changed between then and now. Any changes on your network router in security? Other than that, try upgrading to Navi-X 2.5. I doubt it's the fix but hey, it's always good to try. Whenever your get video working again, you can use 2.5 and queue "background downloads" and watch or listen to whatever while downloading. Try a different forum topic for general XBMC video issues... Goodluck! Added = I found out the latest version of XBMC (March 4th) is having some issues with scripts and plugins so try the latest STABLE build.

iRoNBiLL