While this is supposedly fixed upstream a workaround might be useful. The reason that youtube videos don't work is because youtube uses cookies in some special way to determine which server to stream the video from (which ever server you're nearest to, I suppose). What you need to do in Iceweasel 3.5.11 is: Edit > Preferences > Privacy > History Iceweasel will: "Use custom settings for history" > Exceptions > enter "http://www.youtube.com"; > press block > close > close
That will block youtube cookies and youtube videos will now play. ciao James S.
