Fix koreus parsing

Close #7529
(cherry picked from commit 89b1b06c5eb7a1a5a882b6dfd07d30d9250443be)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

share/lua/playlist/koreus.lua

@@ -47,7 +47,7 @@ function parse()
 			_,_,arturl = string.find( line, "href=\"(.-)\"" )
 		end
 
-        vid_url = string.match( line, '(http://media%d?%.koreus%.com/%d+/%d+/[%w-]*%.mp4)' )
+        vid_url = string.match( line, '(http://embed.koreus.com/%d+/%d+/[%w-]*%.mp4)' )
 		if vid_url then
 			return { { path = vid_url; name = name; description = description; artist = artist; arturl = arturl } }
 		end