rssex2 is probably not updated regularly and the plugins do not work mostly
but you can use the youtube-module of farvoice, play the youtube-videos
first you must install the Youtube Modul from Farvoice
and the playlist should be generated:
#EXTINF:-1,Medina
http://127.0.0.1/?page=get_youtube&id=CjCEZO1qr00
the Original-Link: http://www.youtube.com/watch?v=CjCEZO1qr00
CjCEZO1qr00 is the ID from the Youtube Video
cheers Gerhard