Hi,
I've been testing the support for the Youtbe API feeds and I notice that only the first query in the feed is supported. For example in a perfectly working feed like this: http://gdata.youtube.com/feeds/api/videos?author=wrc&category=corsica&start-index=11&max-results=10&... only the first query ( author=wrc ) is considered for displaying the playlist, the others ( category=corsica , start-index=11, etc.) are just ignored.
I've made several tests, for example changing the order of the queries and in all situations only the first is considered to display in the playlist.
Regards

Did you urlencode your file URI using encodeURIComponent?
file: encodeURIComponent('http://gdata.youtube.com/feeds/api/videos?author=wrc&category=corsica&start-index=11&max-results=10&v=2 '),